static void s_hal_spi_read_isr(hal_spi_t id)
{
hal_spi_internal_item_t* intitem = s_hal_spi_theinternals.items[HAL_spi_id2index(id)];
SPI_TypeDef* SPIx = HAL_spi_id2stmSPI(id);
uint8_t rxbyte = SPI_I2S_ReceiveData(SPIx);
if(intitem->isrrxcounter < intitem->config.sizeofframe)
{
intitem->isrrxframe[intitem->isrrxcounter] = rxbyte;
intitem->isrrxcounter ++;
}
if(intitem->isrrxcounter == intitem->config.sizeofframe)
{ // ok. the frame is finished
// 1. stop spi
s_hal_spi_periph_disable(id); // disable periph
s_hal_spi_rx_isr_disable(id); //hal_SPI4ENCODER_IT_RX_DISA(port); // disable interrupt rx
// set back to zero the frame burst
intitem->frameburstcountdown = 0;
// set rx counter to zero again
intitem->isrrxcounter = 0;
// copy the rxframe into the rx fifo
if(hal_true == hal_utility_fifo_full(&(intitem->fiforx)))
{
hal_utility_fifo_pop(&(intitem->fiforx));
}
hal_utility_fifo_put(&(intitem->fiforx), intitem->isrrxframe);
// now manage the callback
hal_callback_t onframereceiv = intitem->config.onframereceiv;
void *arg = intitem->config.argonframereceiv;
if(NULL != onframereceiv)
{
onframereceiv(arg);
}
}
else
{
// transmit one dummy byte to trigger yet another reception
SPI_I2S_SendData(SPIx, intitem->config.dummytxvalue);
}
}
static void s_hal_spi_dma_init(hal_spi_t id, const hal_spi_cfg_t *cfg)
{
hal_spi_internal_item_t* intitem = s_hal_spi_theinternals.items[HAL_spi_id2index(id)];
hal_dma_cfg_t s_hal_spi_dma_cfg =
{
.transfer = hal_dma_transfer_mem2per, // it changes
.mode = hal_dma_mode_oneshot, // fixed
.intpriority = hal_int_priority06, // fixed
.datasize = cfg->sizeofframe, // fixed
.source = 0, // it changes
.destin = 0, // it changes
.cbk_on_transfer_done = NULL, // it changes
.arg_on_transfer_done = NULL // it changes
};
s_hal_spi_dma_cfg.transfer = hal_dma_transfer_per2mem;
s_hal_spi_dma_cfg.source = (void*)&s_hal_spi_stmSPImap[HAL_spi_id2index(id)]->DR;
s_hal_spi_dma_cfg.destin = intitem->dmarxframe;
s_hal_spi_dma_cfg.cbk_on_transfer_done = s_hal_spi_dma_on_tranfer_done_rx;
s_hal_spi_dma_cfg.arg_on_transfer_done = intitem;
hal_dma_init(s_hal_spi_dma_port2use_rx[HAL_spi_id2index(id)], &s_hal_spi_dma_cfg);
// init dma for tx
s_hal_spi_dma_cfg.transfer = hal_dma_transfer_mem2per;
// s_hal_spi_dma_cfg.source = intitem->dmatxframe;
// s_hal_spi_dma_cfg.destin = &s_hal_spi_stmSPImap[HAL_spi_id2index(id)]->DR;
s_hal_spi_dma_cfg.source = (void*)&s_hal_spi_stmSPImap[HAL_spi_id2index(id)]->DR;
s_hal_spi_dma_cfg.destin = intitem->dmatxframe;
s_hal_spi_dma_cfg.cbk_on_transfer_done = s_hal_spi_dma_on_tranfer_done_tx;
s_hal_spi_dma_cfg.arg_on_transfer_done = intitem;
hal_dma_init(s_hal_spi_dma_port2use_tx[HAL_spi_id2index(id)], &s_hal_spi_dma_cfg);
}
static void s_hal_spi_dma_on_tranfer_done_rx(void* p)
{
hal_spi_internal_item_t* intitem = (hal_spi_internal_item_t*)p;
// 1. copy the rx frame into fifo
if(hal_spi_dir_txonly != intitem->config.direction)
{
if(hal_true == hal_utility_fifo_full(&(intitem->fiforx)))
{
hal_utility_fifo_pop(&(intitem->fiforx));
}
hal_utility_fifo_put(&(intitem->fiforx), intitem->dmarxframe);
}
// 2. verify if we need to stop
hal_bool_t stopit = hal_false;
if(hal_spi_ownership_slave == intitem->config.ownership)
{
stopit = hal_false;
}
else if(hal_spi_ownership_master == intitem->config.ownership)
{
if(255 == intitem->frameburstcountdown)
{
stopit = hal_false;
}
else if(0 == intitem->frameburstcountdown)
{
stopit = hal_true;
}
else
{
intitem->frameburstcountdown --;
if(0 == intitem->frameburstcountdown)
{
stopit = hal_true;
}
else
{
stopit = hal_false;
}
}
}
if(hal_true == stopit)
{
// stop
}
else
{
if(hal_spi_dir_rxonly != intitem->config.direction)
{
// copy into txbuffer a new frame
if(hal_res_OK != hal_utility_fifo_get(&(intitem->fifotx), intitem->dmatxframe, NULL))
{ // put the dummy one.
memcpy(intitem->dmatxframe, intitem->dummytxframe, intitem->config.sizeofframe);
}
}
// retrigger tx
hal_dma_retrigger(s_hal_spi_dma_port2use_tx[HAL_spi_id2index(intitem->id)]);
// retrigger rx
hal_dma_retrigger(s_hal_spi_dma_port2use_rx[HAL_spi_id2index(intitem->id)]);
}
if(hal_spi_dir_txonly != intitem->config.direction)
{
// alert about a reception
hal_callback_t onframereceiv = intitem->config.onframereceiv;
if(NULL != onframereceiv)
{
onframereceiv(intitem->config.argonframereceiv);
}
}
}