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nrf5/hal: Updating TWI DMA implementation. Suspend not working on tx. Rx not implemented yet.

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This commit is contained in:
Glenn Ruben Bakke 2017-01-31 22:36:47 +01:00
parent 5004a6f811
commit 4a568ec1ed
1 changed files with 51 additions and 1 deletions
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52
nrf5/hal/hal_twie.c
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@ -50,8 +50,58 @@ void hal_twi_master_init(NRF_TWI_Type * p_instance, hal_twi_init_t const * p_twi
twim_instance->PSEL.SCL |= (p_twi_init->scl_pin->port << TWIM_PSEL_SCL_PORT_Pos); twim_instance->PSEL.SCL |= (p_twi_init->scl_pin->port << TWIM_PSEL_SCL_PORT_Pos);
twim_instance->PSEL.SDA |= (p_twi_init->sda_pin->port << TWIM_PSEL_SDA_PORT_Pos); twim_instance->PSEL.SDA |= (p_twi_init->sda_pin->port << TWIM_PSEL_SDA_PORT_Pos);
#endif #endif
twim_instance->ADDRESS = p_twi_init->dev_addr;
twim_instance->FREQUENCY = hal_twi_frequency_lookup[p_twi_init->freq]; twim_instance->FREQUENCY = hal_twi_frequency_lookup[p_twi_init->freq];
twim_instance->ENABLE = (TWIM_ENABLE_ENABLE_Enabled << TWIM_ENABLE_ENABLE_Pos);
}
#include <stdio.h>
void hal_twi_master_tx(NRF_TWI_Type * p_instance,
uint8_t addr,
uint16_t transfer_size,
const uint8_t * tx_data,
bool stop) {
// cast to master type
NRF_TWIM_Type * twim_instance = (NRF_TWIM_Type *)p_instance;
twim_instance->ADDRESS = addr;
printf("Hal I2C transfer size: %u, addr: %x, stop: %u\n", transfer_size, addr, stop);
twim_instance->TXD.MAXCNT = transfer_size;
twim_instance->TXD.PTR = (uint32_t)tx_data;
if (stop) {
twim_instance->SHORTS = TWIM_SHORTS_LASTTX_STOP_Msk;
} else {
twim_instance->SHORTS = TWIM_SHORTS_LASTTX_SUSPEND_Msk;
}
if (twim_instance->EVENTS_SUSPENDED == 1) {
printf("Resuming\n");
twim_instance->EVENTS_SUSPENDED = 0;
twim_instance->EVENTS_STOPPED = 0;
twim_instance->TASKS_RESUME = 1; // in case of resume
} else {
printf("Starting\n");
twim_instance->EVENTS_SUSPENDED = 0;
twim_instance->EVENTS_STOPPED = 0;
twim_instance->TASKS_STARTTX = 1;
}
printf("Going into loop\n");
while (twim_instance->EVENTS_STOPPED == 0 && twim_instance->EVENTS_SUSPENDED == 0) {
;
}
}
void hal_twi_master_rx(NRF_TWI_Type * p_instance,
uint8_t addr,
uint16_t transfer_size,
const uint8_t * rx_data) {
// cast to master type
NRF_TWIM_Type * twim_instance = (NRF_TWIM_Type *)p_instance;
twim_instance->ADDRESS = addr;
} }