#define GPIO_FUNC_SEL0 0x80000018 /* GPIO 15 - 0; 2 bit blocks */ #define BASE_UART1 0x80005000 #define UART1_CON 0x80005000 #define UART1_STAT 0x80005004 #define UART1_DATA 0x80005008 #define UR1CON 0x8000500c #define UT1CON 0x80005010 #define UART1_CTS 0x80005014 #define UART1_BR 0x80005018 #define GPIO_PAD_DIR0 0x80000000 #define GPIO_DATA0 0x80000008 #include "embedded_types.h" #include "nvm.h" #define reg(x) (*(volatile uint32_t *)(x)) #define DELAY 400000 void putc(uint8_t c); void puts(uint8_t *s); void put_hex(uint8_t x); void put_hex16(uint16_t x); void put_hex32(uint32_t x); const uint8_t hex[16]={'0','1','2','3','4','5','6','7', '8','9','a','b','c','d','e','f'}; __attribute__ ((section ("startup"))) void main(void) { uint8_t c; uint32_t type; nvmErr_t err; *(volatile uint32_t *)GPIO_PAD_DIR0 = 0x00000100; /* Restore UART regs. to default */ /* in case there is still bootloader state leftover */ reg(UART1_CON) = 0x0000c800; /* mask interrupts, 16 bit sample --- helps explain the baud rate */ /* INC = 767; MOD = 9999 works: 115200 @ 24 MHz 16 bit sample */ #define INC 767 #define MOD 9999 reg(UART1_BR) = INC<<16 | MOD; /* see Section 11.5.1.2 Alternate Modes */ /* you must enable the peripheral first BEFORE setting the function in GPIO_FUNC_SEL */ /* From the datasheet: "The peripheral function will control operation of the pad IF */ /* THE PERIPHERAL IS ENABLED. */ reg(UART1_CON) = 0x00000003; /* enable receive and transmit */ reg(GPIO_FUNC_SEL0) = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/ vreg_init(); puts("CRM status: 0x"); put_hex32(reg(0x80003018)); puts("\n\r"); puts("Detecting internal nvm\n\r"); err = nvm_detect(gNvmInternalInterface_c, &type); puts("nvm_detect returned: 0x"); put_hex(err); puts(" type is: 0x"); put_hex(type); puts("\n\r"); while(1) { }; } void putc(uint8_t c) { while(reg(UT1CON)==31); /* wait for there to be room in the buffer */ reg(UART1_DATA) = c; } void puts(uint8_t *s) { while(s && *s!=0) { putc(*s++); } } void put_hex(uint8_t x) { putc(hex[x >> 4]); putc(hex[x & 15]); } void put_hex16(uint16_t x) { put_hex((x >> 8) & 0xFF); put_hex((x) & 0xFF); } void put_hex32(uint32_t x) { put_hex((x >> 24) & 0xFF); put_hex((x >> 16) & 0xFF); put_hex((x >> 8) & 0xFF); put_hex((x) & 0xFF); }