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msp432p401lp-cc256x: config baudrate on init, config alt dma transfer for rx

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This commit is contained in:
Matthias Ringwald 2020-11-19 10:09:28 +01:00
parent 5ad984f6b0
commit 2171803ecd
1 changed files with 21 additions and 16 deletions
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37
port/msp432p401lp-cc256x/main.c
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@ -171,6 +171,7 @@ void hal_led_toggle(void){
// HAL UART DMA
#include "hal_uart_dma.h"
// DMA Control Table
// if not all channels are used, the alignment can be finer
// GCC
@ -302,24 +303,11 @@ static uint16_t hal_dma_rx_bytes_avail(uint8_t buffer, uint16_t offset){
return HAL_DMA_RX_BUFFER_SIZE - MAP_DMA_getChannelSize(channel) - offset;
}
void DMA_INT1_IRQHandler(void)
{
MAP_DMA_clearInterruptFlag(DMA_CH4_EUSCIA2TX & 0x0F);
MAP_DMA_disableChannel(DMA_CH4_EUSCIA2TX & 0x0F);
(*tx_done_handler)();
}
void DMA_INT2_IRQHandler(void)
{
MAP_DMA_clearInterruptFlag(DMA_CH5_EUSCIA2RX & 0x0F);
// raise our RTS
GPIO_setOutputHighOnPin(BLUETOOTH_CTS_PORT, BLUETOOTH_CTS_PIN);
}
static void hal_uart_dma_harvest(void){
if (bytes_to_read == 0) return;
// get bytes from current buffer
uint16_t bytes_avail = hal_dma_rx_bytes_avail(hal_dma_rx_active_buffer, hal_dma_rx_offset);
if (bytes_avail == 0) return;
uint16_t bytes_to_copy = btstack_min(bytes_avail, bytes_to_read);
memcpy(rx_buffer_ptr, &hal_dma_rx_ping_pong_buffer[hal_dma_rx_active_buffer * HAL_DMA_RX_BUFFER_SIZE + hal_dma_rx_offset], bytes_to_copy);
rx_buffer_ptr += bytes_to_copy;
@ -337,6 +325,23 @@ static void hal_uart_dma_harvest(void){
}
}
void DMA_INT1_IRQHandler(void)
{
MAP_DMA_clearInterruptFlag(DMA_CH4_EUSCIA2TX & 0x0F);
MAP_DMA_disableChannel(DMA_CH4_EUSCIA2TX & 0x0F);
(*tx_done_handler)();
}
void DMA_INT2_IRQHandler(void)
{
MAP_DMA_clearInterruptFlag(DMA_CH5_EUSCIA2RX & 0x0F);
// raise our RTS
GPIO_setOutputHighOnPin(BLUETOOTH_CTS_PORT, BLUETOOTH_CTS_PIN);
hal_uart_dma_harvest();
}
void hal_uart_dma_init(void){
// nShutdown
MAP_GPIO_setAsOutputPin(BLUETOOTH_nSHUTDOWN_PORT, BLUETOOTH_nSHUTDOWN_PIN);
@ -352,6 +357,7 @@ void hal_uart_dma_init(void){
// UART
/* Configuring and enable UART Module */
hal_uart_dma_config(115200);
MAP_UART_initModule(EUSCI_A2_BASE, &uartConfig);
MAP_UART_enableModule(EUSCI_A2_BASE);
@ -368,6 +374,7 @@ void hal_uart_dma_init(void){
/* Setup the RX and TX transfer characteristics */
MAP_DMA_setChannelControl(DMA_CH4_EUSCIA2TX | UDMA_PRI_SELECT, UDMA_SIZE_8 | UDMA_SRC_INC_8 | UDMA_DST_INC_NONE | UDMA_ARB_1);
MAP_DMA_setChannelControl(DMA_CH5_EUSCIA2RX | UDMA_PRI_SELECT, UDMA_SIZE_8 | UDMA_SRC_INC_NONE | UDMA_DST_INC_8 | UDMA_ARB_1);
MAP_DMA_setChannelControl(DMA_CH5_EUSCIA2RX | UDMA_ALT_SELECT, UDMA_SIZE_8 | UDMA_SRC_INC_NONE | UDMA_DST_INC_8 | UDMA_ARB_1);
/* Enable DMA interrupt for both channels */
MAP_DMA_assignInterrupt(INT_DMA_INT1, DMA_CH4_EUSCIA2TX & 0x0f);
@ -545,8 +552,6 @@ int main(void)
// hand over to btstack embedded code
btstack_main(0, NULL);
hci_power_control(HCI_POWER_ON);
// go
btstack_run_loop_execute();
}