#define GPIO_PAD_DIR0 0x80000000 #define GPIO_DATA0 0x80000008 #define GPIO_FUNC_SEL0 0x80000018 /* GPIO 15 - 0; 2 bit blocks */ #define GPIO_PAD_PU_EN0 0x80000010 #define GPIO_PAD_PU_EN1 0x80000014 #define ADC_CONTROL 0x80000018 #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 DELAY 400000 #define USE_32KHZ 1 #include "embedded_types.h" #include "isr.h" #include "utils.h" #include "maca.h" #include "crm.h" 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'}; typedef void (*pfCallback_t)(void); typedef struct { uint8_t sleepType:1;// 0 hibernate / 1 doze uint8_t ramRet:2; uint8_t mcuRet:1; uint8_t digPadRet:1; pfCallback_t pfToDoBeforeSleep; }crmSleepCtrl_t; void do_nothing(void) { return; } void (*crm_gotosleep)(crmSleepCtrl_t *foo) = 0x0000364d; __attribute__ ((section ("startup"))) void main(void) { crmSleepCtrl_t crmSleepCtrl; // reg32(GPIO_PAD_DIR0) = 0x00000100; // reg32(GPIO_DATA0) = 0x00000100; /* Restore UART regs. to default */ /* in case there is still bootloader state leftover */ // *(volatile uint32_t *)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 // *(volatile uint32_t *)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. */ // *(volatile uint32_t *)UART1_CON = 0x00000003; /* enable receive and transmit */ // *(volatile uint32_t *)GPIO_FUNC_SEL0 = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/ reg32(0x00401ffc) = 0x01234567; reg32(0x00407ffc) = 0xdeadbeef; reg32(0x0040fffc) = 0xface00ff; reg32(0x00410000) = 0xabcd0123; puts("sleep test\n\r"); puts("0x00401ffc: "); put_hex32(reg32(0x00401ffc)); puts("\r\n"); puts("0x00407ffc: "); put_hex32(reg32(0x00407ffc)); puts("\r\n"); puts("0x0040fffc: "); put_hex32(reg32(0x0040fffc)); puts("\r\n"); puts("0x00410000: "); put_hex32(reg32(0x00410000)); puts("\r\n"); /* radio must be OFF before sleeping */ /* otherwise MCU will not wake up properly */ /* this is undocumented behavior */ radio_off(); /* disable all pullups */ /* seems to make a slight difference (2.0uA vs 1.95uA)*/ reg32(GPIO_PAD_PU_EN0) = 0; reg32(GPIO_PAD_PU_EN1) = 0; reg16(ADC_CONTROL) = 0; /* internal Vref2 */ reg16(CRM_XTAL_CNTL) = 0x052; /* default is 0xf52 */ /* doesn't anything w.r.t. power */ #if USE_32KHZ /* turn on the 32kHz crystal */ puts("enabling 32kHz crystal\n\r"); /* you have to hold it's hand with this on */ /* once you start the 32xHz crystal it can only be stopped with a reset (hard or soft) */ /* first, disable the ring osc */ clear_bit(reg32(CRM_RINGOSC_CNTL),0); /* enable the 32kHZ crystal */ set_bit(reg32(CRM_XTAL32_CNTL),0); /* set the XTAL32_EXISTS bit */ /* the datasheet says to do this after you've check that RTC_COUNT is changing */ /* the datasheet is not correct */ set_bit(reg32(CRM_SYS_CNTL),5); { static volatile uint32_t old; old = reg32(CRM_RTC_COUNT); puts("waiting for xtal\n\r"); while(reg32(CRM_RTC_COUNT) == old) { continue; } /* RTC has started up */ set_bit(reg32(CRM_SYS_CNTL),5); puts("32kHZ xtal started\n\r"); } #endif /* go to sleep */ // reg32(CRM_WU_CNTL) = 0; /* don't wake up */ reg32(CRM_WU_CNTL) = 0x1; /* enable wakeup from wakeup timer */ // reg32(CRM_WU_TIMEOUT) = 1875000; /* wake 10 sec later if doze */ #if USE_32KHZ reg32(CRM_WU_TIMEOUT) = 327680*2; #else reg32(CRM_WU_TIMEOUT) = 20000; /* wake 10 sec later if hibernate w/2kHz*/ #endif /* hobby board: 2kHz = 11uA; 32kHz = 11uA */ // reg32(CRM_SLEEP_CNTL) = 1; /* hibernate, RAM page 0 only, don't retain state, don't power GPIO */ /* approx. 2kHz = 2.0uA */ /* hobby board: 2kHz = 18uA; 32kHz = 19uA */ // reg32(CRM_SLEEP_CNTL) = 0x41; /* hibernate, RAM page 0 only, retain state, don't power GPIO */ /* approx. 2kHz = 10.0uA */ /* hobby board: 2kHz = 20uA; 32kHz = 21uA */ // reg32(CRM_SLEEP_CNTL) = 0x51; /* hibernate, RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 2kHz = 11.7uA */ /* hobby board: 2kHz = 22uA; 32kHz = 22.5uA */ // reg32(CRM_SLEEP_CNTL) = 0x61; /* hibernate, RAM page 0,1,2 only, retain state, don't power GPIO */ /* approx. 2kHz = 13.9uA */ /* hobby board: 2kHz = 24uA; 32kHz = 25uA */ // reg32(CRM_SLEEP_CNTL) = 0x71; /* hibernate, all RAM pages, retain state, don't power GPIO */ /* approx. 2kHz = 16.1uA */ // reg32(CRM_SLEEP_CNTL) = 0xf1; /* hibernate, all RAM pages, retain state, power GPIO */ /* consumption depends on GPIO hookup */ // reg32(CRM_SLEEP_CNTL) = 2; /* doze , RAM page 0 only, don't retain state, don't power GPIO */ /* approx. 69.2 uA */ // reg32(CRM_SLEEP_CNTL) = 0x42; /* doze , RAM page 0 only, retain state, don't power GPIO */ /* approx. 77.3uA */ // reg32(CRM_SLEEP_CNTL) = 0x52; /* doze , RAM page 0&1 only, retain state, don't power GPIO */ /* approx. 78.9uA */ // reg32(CRM_SLEEP_CNTL) = 0x62; /* doze , RAM page 0,1,2 only, retain state, don't power GPIO */ /* approx. 81.2uA */ // reg32(CRM_SLEEP_CNTL) = 0x72; /* doze , all RAM pages, retain state, don't power GPIO */ /* approx. 83.4uA - possibly with periodic refresh*/ // reg32(CRM_SLEEP_CNTL) = 0xf2; /* doze , all RAM pages, retain state, power GPIO */ /* consumption depends on GPIO hookup */ /* crmSleepCtrl.sleepType = 0; */ /* crmSleepCtrl.ramRet = 3; */ /* crmSleepCtrl.mcuRet = 1; */ /* crmSleepCtrl.digPadRet = 1; */ /* crmSleepCtrl.pfToDoBeforeSleep = do_nothing; */ /* crm_gotosleep(&crmSleepCtrl); */ /* wait for the sleep cycle to complete */ while((reg32(CRM_STATUS) & 0x1) == 0) { continue; } /* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and powers down */ reg32(CRM_STATUS) = 1; /* asleep */ /* wait for the awake cycle to complete */ while((reg32(CRM_STATUS) & 0x1) == 0) { continue; } /* write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and finishes wakeup */ reg32(CRM_STATUS) = 1; puts("\n\r\n\r\n\r"); puts("0x00401ffc: "); put_hex32(reg32(0x00401ffc)); puts("\r\n"); puts("0x00407ffc: "); put_hex32(reg32(0x00407ffc)); puts("\r\n"); puts("0x0040fffc: "); put_hex32(reg32(0x0040fffc)); puts("\r\n"); puts("0x00410000: "); put_hex32(reg32(0x00410000)); puts("\r\n"); volatile uint32_t i; while(1) { reg32(GPIO_DATA0) = 0x00000100; for(i=0; i> 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); }