mirror of
https://github.com/oliverschmidt/contiki.git
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288 lines
6.6 KiB
C
288 lines
6.6 KiB
C
#define GPIO_FUNC_SEL0 0x80000018 /* GPIO 15 - 0; 2 bit blocks */
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#define BASE_UART1 0x80005000
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#define UART1_CON 0x80005000
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#define UART1_STAT 0x80005004
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#define UART1_DATA 0x80005008
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#define UR1CON 0x8000500c
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#define UT1CON 0x80005010
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#define UART1_CTS 0x80005014
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#define UART1_BR 0x80005018
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#define GPIO_PAD_DIR0 0x80000000
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#define GPIO_DATA0 0x80000008
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#include "embedded_types.h"
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#include "nvm.h"
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#include "maca.h"
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#define reg(x) (*(volatile uint32_t *)(x))
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#define DELAY 400000
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/* if both BOOT_OK and BOOT_SECURE are 0 then flash image will not be bootable */
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/* if both are 1 then flash image will be secure */
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#define BOOT_OK 1
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#define BOOT_SECURE 0
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#define DEBUG 1
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#if DEBUG
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#define dbg_putc(...) putc(__VA_ARGS__)
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#define dbg_puts(...) puts(__VA_ARGS__)
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#define dbg_put_hex(...) put_hex(__VA_ARGS__)
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#define dbg_put_hex16(...) put_hex16(__VA_ARGS__)
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#define dbg_put_hex32(...) put_hex32(__VA_ARGS__)
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#else
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#define dbg_putc(...)
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#define dbg_puts(...)
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#define dbg_put_hex(...)
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#define dbg_put_hex16(...)
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#define dbg_put_hex32(...)
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#endif
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const uint8_t hex[16]={'0','1','2','3','4','5','6','7',
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'8','9','a','b','c','d','e','f'};
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uint8_t getc(void);
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void flushrx(void);
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uint32_t to_u32(char *c);
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#include "isr.h"
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#define NBYTES 16
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enum parse_states {
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SCAN_X,
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READ_CHARS,
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PROCESS,
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MAX_STATE,
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};
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__attribute__ ((section ("startup")))
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void main(void) {
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nvmType_t type=0;
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nvmErr_t err;
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volatile uint8_t c;
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volatile uint32_t buf[NBYTES/4];
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volatile uint32_t i;
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volatile uint32_t len=0;
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volatile uint32_t state = SCAN_X;
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volatile uint32_t addr,data;
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*(volatile uint32_t *)GPIO_PAD_DIR0 = 0x00000100;
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/* Restore UART regs. to default */
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/* in case there is still bootloader state leftover */
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reg(UART1_CON) = 0x0000c800; /* mask interrupts, 16 bit sample --- helps explain the baud rate */
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/* INC = 767; MOD = 9999 works: 115200 @ 24 MHz 16 bit sample */
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#define INC 767
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#define MOD 9999
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reg(UART1_BR) = INC<<16 | MOD;
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/* see Section 11.5.1.2 Alternate Modes */
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/* you must enable the peripheral first BEFORE setting the function in GPIO_FUNC_SEL */
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/* From the datasheet: "The peripheral function will control operation of the pad IF */
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/* THE PERIPHERAL IS ENABLED. */
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reg(UART1_CON) = 0x00000003; /* enable receive and transmit */
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reg(GPIO_FUNC_SEL0) = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
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vreg_init();
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dbg_puts("Detecting internal nvm\n\r");
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err = nvm_detect(gNvmInternalInterface_c, &type);
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dbg_puts("nvm_detect returned: 0x");
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dbg_put_hex(err);
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dbg_puts(" type is: 0x");
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dbg_put_hex32(type);
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dbg_puts("\n\r");
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/* erase the flash */
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err = nvm_erase(gNvmInternalInterface_c, type, 0x4fffffff);
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dbg_puts("nvm_erase returned: 0x");
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dbg_put_hex(err);
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dbg_puts("\n\r");
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dbg_puts(" type is: 0x");
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dbg_put_hex32(type);
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dbg_puts("\n\r");
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/* say we are ready */
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len = 0;
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puts("ready");
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flushrx();
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/* read the length */
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for(i=0; i<4; i++) {
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c = getc();
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/* bail if the first byte of the length is zero */
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len += (c<<(i*8));
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}
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dbg_puts("len: ");
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dbg_put_hex32(len);
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dbg_puts("\n\r");
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/* write the OKOK magic */
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#if BOOT_OK
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((uint8_t *)buf)[0] = 'O'; ((uint8_t *)buf)[1] = 'K'; ((uint8_t *)buf)[2] = 'O'; ((uint8_t *)buf)[3] = 'K';
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#elif BOOT_SECURE
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((uint8_t *)buf)[0] = 'S'; ((uint8_t *)buf)[1] = 'E'; ((uint8_t *)buf)[2] = 'C'; ((uint8_t *)buf)[3] = 'U';
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#else
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((uint8_t *)buf)[0] = 'N'; ((uint8_t *)buf)[1] = 'O'; ((uint8_t *)buf)[2] = 'N'; ((uint8_t *)buf)[3] = 'O';
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#endif
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dbg_puts(" type is: 0x");
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dbg_put_hex32(type);
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dbg_puts("\n\r");
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err = nvm_write(gNvmInternalInterface_c, type, (uint8_t *)buf, 0, 4);
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dbg_puts("nvm_write returned: 0x");
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dbg_put_hex(err);
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dbg_puts("\n\r");
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/* write the length */
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err = nvm_write(gNvmInternalInterface_c, type, (uint8_t *)&len, 4, 4);
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/* read a byte, write a byte */
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/* byte at a time will make this work as a contiki process better */
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/* for OTAP */
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for(i=0; i<len; i++) {
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c = getc();
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err = nvm_write(gNvmInternalInterface_c, type, &c, 8+i, 1);
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}
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puts("flasher done\n\r");
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state = SCAN_X; addr=0;
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while((c=getc())) {
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if(state == SCAN_X) {
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/* read until we see an 'x' */
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if(c==0) { break; }
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if(c!='x'){ continue; }
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/* go to read_chars once we have an 'x' */
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state = READ_CHARS;
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i = 0;
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}
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if(state == READ_CHARS) {
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/* read all the chars up to a ',' */
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((uint8_t *)buf)[i++] = c;
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/* after reading a ',' */
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/* goto PROCESS state */
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if((c == ',') || (c == 0)) { state = PROCESS; }
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}
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if(state == PROCESS) {
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if(addr==0) {
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/*interpret the string as the starting address */
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addr = to_u32((uint8_t *)buf);
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} else {
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/* string is data to write */
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data = to_u32((uint8_t *)buf);
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puts("writing addr ");
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put_hex32(addr);
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puts(" data ");
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put_hex32(data);
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puts("\n\r");
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err = nvm_write(gNvmInternalInterface_c, 1, (uint8_t *)&data, addr, 4);
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addr += 4;
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}
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/* look for the next 'x' */
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state=SCAN_X;
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}
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}
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while(1) {continue;};
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}
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void flushrx(void)
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{
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volatile uint8_t c;
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while(reg(UR1CON) !=0) {
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c = reg(UART1_DATA);
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}
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}
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/* Convert from ASCII hex. Returns
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the value, or 16 if it was space/newline, or
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32 if some other character. */
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uint8_t from_hex(uint8_t ch)
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{
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if(ch==' ' || ch=='\r' || ch=='\n')
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return 16;
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if(ch < '0')
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goto bad;
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if(ch <= '9')
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return ch - '0';
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ch |= 0x20;
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if(ch < 'a')
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goto bad;
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if(ch <= 'f')
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return ch - 'a' + 10;
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bad:
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return 32;
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}
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uint32_t to_u32(char *c)
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{
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volatile uint32_t ret=0;
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volatile uint32_t i,val;
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/* c should be /x\d+,/ */
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i=1; /* skip x */
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while(c[i] != ',') {
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ret = ret<<4;
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val = from_hex(c[i++]);
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ret += val;
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}
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return ret;
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}
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uint8_t getc(void)
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{
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volatile uint8_t c;
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while(reg(UR1CON) == 0);
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c = reg(UART1_DATA);
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return c;
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}
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void putc(uint8_t c) {
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while(reg(UT1CON)==31); /* wait for there to be room in the buffer */
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reg(UART1_DATA) = c;
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}
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void puts(uint8_t *s) {
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while(s && *s!=0) {
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putc(*s++);
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}
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}
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void put_hex(uint8_t x)
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{
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putc(hex[x >> 4]);
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putc(hex[x & 15]);
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}
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void put_hex16(uint16_t x)
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{
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put_hex((x >> 8) & 0xFF);
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put_hex((x) & 0xFF);
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}
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void put_hex32(uint32_t x)
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{
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put_hex((x >> 24) & 0xFF);
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put_hex((x >> 16) & 0xFF);
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put_hex((x >> 8) & 0xFF);
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put_hex((x) & 0xFF);
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}
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