void drv_rtc_set_time_date(rtc_t * set_time)
{
uint8_t set_time_array[BCD_ARRAY_SIZE];
drv_rtc_convert_struct_to_array(set_time, set_time_array, BCD_ARRAY_SIZE);
// Select the RTC chip on the SPI bus.
// bsp_pin_digital_write(&pins.rtc_cs, ENABLED);
// When the SPI port is available, set the address to write to.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
EUSCI_B_SPI_transmitData(EUSCI_B0_BASE, 0x80);
uint8_t i;
for ( i = 0; i < BCD_ARRAY_SIZE; i++)
{
// When the SPI port is available, write the data.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
EUSCI_B_SPI_transmitData(EUSCI_B0_BASE, set_time_array[i]);
}
// Deselect the RTC chip.
// bsp_pin_digital_write(&pins.rtc_cs, DISABLED);
}
rtc_t drv_rtc_read_time_date(void)
{
// Create an array to hold the RTC data when read in from the chip.
uint8_t TimeDate[7]; //second,minute,hour,null,day,month,year
// Enable the RTC chip on the SPI bus.
// bsp_pin_digital_write(&pins.rtc_cs, ENABLED);
// When the SPI port is available, select the starting address to read.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
EUSCI_B_SPI_transmitData(EUSCI_B0_BASE, 0x00);
// Create an iterator.
uint8_t i;
// Loop through the RTC registers and read out the date and time.
for ( i = 0; i <= 6; i++)
{
// When the SPI port is available, shift out don't care bits to shift
// in the register we want to read.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
EUSCI_B_SPI_transmitData(EUSCI_B0_BASE, 0x00);
// Once the transaction is complete retrieve the value shifted in.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
TimeDate[i] = EUSCI_B_SPI_receiveData(EUSCI_B0_BASE);
}
// Deselect the RTC chip.
// bsp_pin_digital_write(&pins.rtc_cs, DISABLED);
// Create a RTC struct and stuff it with the converted bytes from the array.
rtc_t current_time;
drv_rtc_convert_array_to_struct(TimeDate, ¤t_time);
// Return rtc struct
return (current_time);
}
void drv_rtc_init(void)
{
// Structure that holds all the SPI config info
EUSCI_B_SPI_initMasterParam spi_b0_param =
{
EUSCI_B_SPI_CLOCKSOURCE_SMCLK,
8000000,
8000000,
EUSCI_B_SPI_MSB_FIRST,
EUSCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT,
EUSCI_B_SPI_CLOCKPOLARITY_INACTIVITY_LOW,
EUSCI_B_SPI_3PIN
};
// Initalize and enable the SPI port.
EUSCI_B_SPI_initMaster(EUSCI_B0_BASE, &spi_b0_param);
EUSCI_B_SPI_enable(EUSCI_B0_BASE);
// Enable the RTC chip's chip select.
// bsp_pin_digital_write(&pins.rtc_cs, ENABLED);
// Wait for the SPI port to be available.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
// Send address to configure.
EUSCI_B_SPI_transmitData(EUSCI_B0_BASE, 0x8E);
// Wait for the SPI port to be available.
while (EUSCI_B_SPI_isBusy(EUSCI_B0_BASE))
{
;
}
// Config device to disable Osciallator and Battery SQ wave @1hz, temp
// compensation, Alarms disabled.
EUSCI_B_SPI_transmitData(EUSCI_B0_BASE, 0x60);
// Deselect the RTC chip.
// bsp_pin_digital_write(&pins.rtc_cs, DISABLED);
//delay(10);
}
void SPI_transmitData(uint32_t moduleInstance, uint_fast8_t transmitData)
{
if (is_A_Module(moduleInstance))
{
EUSCI_A_SPI_transmitData(moduleInstance, transmitData);
} else
{
EUSCI_B_SPI_transmitData(moduleInstance, transmitData);
}
}
