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/*
* Test code for the RTC.
*
* Dumps the SRAM and EEPROM on startup, then enables the oscillator.
* After that, the clock registers are read once a second - the first byte
* is seconds (and some control bits, so dont expect 0..59).
*
*/
#include <string.h>
#include "stm-init.h"
#include "stm-led.h"
#include "stm-uart.h"
#include "stm-rtc.h"
#define DELAY() HAL_Delay(1000)
uint8_t buf[1024];
uint32_t i;
uint32_t device_ready(uint16_t i2c_addr)
{
uart_send_string("Checking readiness of 0x");
uart_send_hex(i2c_addr, 4);
uart_send_string("...");
if (rtc_device_ready(i2c_addr) == HAL_OK) {
uart_send_string("OK\r\n");
return 1;
}
uart_send_string("Not ready (0x");
uart_send_hex(i, 4);
uart_send_string(")\r\n");
return 0;
}
void send_byte(const uint16_t i2c_addr, const uint8_t value)
{
uint8_t ch = value;
uart_send_string("Sending ");
uart_send_hex(ch, 2);
uart_send_string(" to 0x");
uart_send_hex(i2c_addr, 4);
uart_send_string("...");
if (rtc_send_byte(i2c_addr, ch, 1000) != HAL_OK) {
uart_send_string("Timeout\r\n");
Error_Handler();
}
uart_send_string("OK\r\n");
}
void read_bytes (uint8_t *buf, const uint16_t i2c_addr, const uint8_t len)
{
uart_send_string("Reading ");
uart_send_integer(len, 1);
uart_send_string(" bytes from 0x");
uart_send_hex(i2c_addr, 4);
uart_send_string("...");
if (rtc_read_bytes(i2c_addr, buf, len, 1000) != HAL_OK) {
uart_send_string("Timeout\r\n");
Error_Handler();
}
uart_send_string("OK\r\n");
}
void request_data(uint8_t *buf, const uint16_t i2c_addr, const uint8_t offset, const uint8_t bytes)
{
send_byte(i2c_addr, offset);
read_bytes(buf, i2c_addr, bytes);
}
void print_time()
{
request_data(buf, RTC_RTC_ADDR, RTC_TIME_OFFSET, RTC_TIME_BYTES);
for (i = 0; i < RTC_TIME_BYTES; i++) {
uart_send_hex(buf[i], 2);
uart_send_string(" ");
}
}
void dump_sram()
{
request_data(buf, RTC_RTC_ADDR, 0x0, RTC_SRAM_TOTAL_BYTES);
uart_send_string("SRAM contents:\r\n");
uart_send_hexdump(buf, 0, RTC_SRAM_TOTAL_BYTES);
uart_send_string("\r\n");
}
void dump_eeprom()
{
request_data(buf, RTC_EEPROM_ADDR, 0x0, RTC_EEPROM_TOTAL_BYTES);
uart_send_string("EEPROM contents:\r\n");
uart_send_hexdump(buf, 0, RTC_EEPROM_TOTAL_BYTES);
uart_send_string("\r\n");
request_data(buf, RTC_EEPROM_ADDR, RTC_EEPROM_EUI48_OFFSET, RTC_EEPROM_EUI48_BYTES);
uart_send_string("EEPROM EUI-48:\r\n");
uart_send_hexdump(buf, RTC_EEPROM_EUI48_OFFSET, RTC_EEPROM_EUI48_BYTES);
uart_send_string("\r\n");
}
void enable_oscillator()
{
uart_send_string("Enabling oscillator...\r\n");
if (rtc_enable_oscillator() != HAL_OK) {
uart_send_string("Timeout\r\n");
Error_Handler();
}
uart_send_string("OK\r\n");
}
int
main()
{
stm_init();
uart_send_string("\r\n\r\n*** Init done\r\n");
dump_sram();
dump_eeprom();
enable_oscillator();
while (1) {
memset(buf, 0, sizeof(buf));
if (! device_ready(RTC_RTC_ADDR)) {
goto fail;
}
print_time(buf);
uart_send_string("\r\n\r\n");
HAL_GPIO_TogglePin(LED_PORT, LED_GREEN);
DELAY();
continue;
fail:
HAL_GPIO_TogglePin(LED_PORT, LED_RED);
DELAY();
}
}
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