mhu/reflow-oven-control-sw
2
0
Fork 0
Code Issues 4 Pull Requests Releases 4 Wiki Activity

Make ring buffers volatile

Browse Source
This commit is contained in:
Mario Hüttel
2020-02-16 11:42:18 +01:00
parent 1d62bc22b8
commit 7ade829a70
3 changed files with 12 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
stm-firmware/stm-periph/dma-ring-buffer.c
View File

@@ -50,7 +50,7 @@ static int dma_ring_buffer_switch_clock_enable(uint8_t base_dma, bool clk_en)
int dma_ring_buffer_periph_to_mem_initialize(struct dma_ring_buffer_to_mem *dma_buffer, uint8_t base_dma_id,
DMA_Stream_TypeDef *dma_stream, size_t buffer_element_count, size_t element_size,
void *data_buffer, void* src_reg, uint8_t dma_trigger_channel)
volatile void *data_buffer, void* src_reg, uint8_t dma_trigger_channel)
{
int ret_val = 0;
@@ -83,7 +83,7 @@ int dma_ring_buffer_periph_to_mem_initialize(struct dma_ring_buffer_to_mem *dma_
return 0;
}
int dma_ring_buffer_periph_to_mem_get_data(struct dma_ring_buffer_to_mem *buff, const void **data_buff, size_t *len)
int dma_ring_buffer_periph_to_mem_get_data(struct dma_ring_buffer_to_mem *buff, const volatile void **data_buff, size_t *len)
{
int ret_code = 0;
uint32_t ndtr;
@@ -92,17 +92,18 @@ int dma_ring_buffer_periph_to_mem_get_data(struct dma_ring_buffer_to_mem *buff,
if (!buff || !data_buff || !len)
return -1;
ndtr = buff->dma->NDTR;
put_idx = buff->buffer_count - ndtr;
/* Check if wrap around */
if (put_idx < buff->get_idx) {
/* Available data wraps around end of buffer: Return first part upt to the end of the ring buffer */
*data_buff = &(((char *)buff->data_ptr)[buff->get_idx * buff->element_size]);
*len = buff->buffer_count - buff->get_idx;
buff->get_idx = 0;
ret_code = 2;
} else if (put_idx > buff->get_idx) {
/* Data does not wrap around ring buffer. Return full data */
*data_buff = &(((char *)buff->data_ptr)[buff->get_idx * buff->element_size]);
*len = put_idx - buff->get_idx;
buff->get_idx += *len;
@@ -130,7 +131,7 @@ void dma_ring_buffer_periph_to_mem_stop(struct dma_ring_buffer_to_mem *buff)
memset(buff, 0, sizeof(struct dma_ring_buffer_to_mem));
}
int dma_ring_buffer_mem_to_periph_initialize(struct dma_ring_buffer_to_periph *dma_buffer, uint8_t base_dma_id, DMA_Stream_TypeDef *dma_stream, size_t buffer_element_count, size_t element_size, void *data_buffer, uint8_t dma_trigger_channel, void *dest_reg)
int dma_ring_buffer_mem_to_periph_initialize(struct dma_ring_buffer_to_periph *dma_buffer, uint8_t base_dma_id, DMA_Stream_TypeDef *dma_stream, size_t buffer_element_count, size_t element_size, volatile void *data_buffer, uint8_t dma_trigger_channel, void *dest_reg)
{
if (!dma_buffer || !dma_stream || !data_buffer || !dest_reg)
return -1000;
@@ -244,7 +245,7 @@ int dma_ring_buffer_mem_to_periph_insert_data(struct dma_ring_buffer_to_periph *
first_round_count = buff->element_size * (buff->buffer_count - buff->sw_put_idx);
memcpy(dest_ptr, insert_ptr, first_round_count);
insert_ptr += first_round_count;
memcpy(buff->src_buffer, insert_ptr, count - first_round_count);
memcpy((void *)buff->src_buffer, insert_ptr, count - first_round_count);
/* Move put index */
buff->sw_put_idx = count - first_round_count;

2
stm-firmware/stm-periph/uart.c
View File

@@ -107,7 +107,7 @@ void uart_send_string_with_dma(const char *string)
int uart_receive_data_with_dma(const char **data, size_t *len)
{
return dma_ring_buffer_periph_to_mem_get_data(&ring_buff_rx, (const void **)data, len);
return dma_ring_buffer_periph_to_mem_get_data(&ring_buff_rx, (const volatile void **)data, len);
}
void DMA2_Stream7_IRQHandler()