diff options
Diffstat (limited to 'projects/hsm')
| -rw-r--r-- | projects/hsm/mgmt-cli.c | 83 |
1 files changed, 55 insertions, 28 deletions
diff --git a/projects/hsm/mgmt-cli.c b/projects/hsm/mgmt-cli.c index 2606e21..61c8c35 100644 --- a/projects/hsm/mgmt-cli.c +++ b/projects/hsm/mgmt-cli.c @@ -34,6 +34,8 @@ #include <string.h> +#include "cmsis_os.h" + #include "stm-init.h" #include "stm-uart.h" #include "stm-led.h" @@ -46,26 +48,59 @@ #include "mgmt-keystore.h" #include "mgmt-masterkey.h" -/* MGMT UART interrupt receive buffer (data will be put in a larger ring buffer) */ -volatile uint8_t uart_rx; - #ifndef CLI_UART_RECVBUF_SIZE -#define CLI_UART_RECVBUF_SIZE 256 /* This must be a power of 2 */ +#define CLI_UART_RECVBUF_SIZE 256 #endif -#define CLI_UART_RECVBUF_MASK (CLI_UART_RECVBUF_SIZE - 1) typedef struct { - uint32_t enabled, ridx; + int ridx; + volatile int widx; mgmt_cli_dma_state_t rx_state; uint8_t buf[CLI_UART_RECVBUF_SIZE]; -} uart_ringbuf_t; +} ringbuf_t; + +inline void ringbuf_init(ringbuf_t *rb) +{ + memset(rb, 0, sizeof(*rb)); +} + +/* return number of characters read */ +inline int ringbuf_read_char(ringbuf_t *rb, uint8_t *c) +{ + if (rb->ridx != rb->widx) { + *c = rb->buf[rb->ridx]; + if (++rb->ridx >= sizeof(rb->buf)) + rb->ridx = 0; + return 1; + } + return 0; +} -volatile uart_ringbuf_t uart_ringbuf = {1, 0, DMA_RX_STOP, {0}}; +inline void ringbuf_write_char(ringbuf_t *rb, uint8_t c) +{ + rb->buf[rb->widx] = c; + if (++rb->widx >= sizeof(rb->buf)) + rb->widx = 0; +} -#define RINGBUF_RIDX(rb) (rb.ridx & CLI_UART_RECVBUF_MASK) -#define RINGBUF_WIDX(rb) (sizeof(rb.buf) - __HAL_DMA_GET_COUNTER(huart_mgmt.hdmarx)) -#define RINGBUF_COUNT(rb) ((unsigned)(RINGBUF_WIDX(rb) - RINGBUF_RIDX(rb))) -#define RINGBUF_READ(rb, dst) {dst = rb.buf[RINGBUF_RIDX(rb)]; rb.buf[RINGBUF_RIDX(rb)] = '.'; rb.ridx++;} +static ringbuf_t uart_ringbuf; + +/* current character received from UART */ +static uint8_t uart_rx; + +/* Semaphore to inform uart_cli_read that there's a new character. + */ +osSemaphoreId uart_sem; +osSemaphoreDef(uart_sem); + +/* Callback for HAL_UART_Receive_DMA(). + */ +void HAL_UART1_RxCpltCallback(UART_HandleTypeDef *huart) +{ + ringbuf_write_char(&uart_ringbuf, uart_rx); + osSemaphoreRelease(uart_sem); + HAL_UART_Receive_DMA(huart, &uart_rx, 1); +} static void uart_cli_print(struct cli_def *cli __attribute__ ((unused)), const char *buf) { @@ -76,18 +111,11 @@ static void uart_cli_print(struct cli_def *cli __attribute__ ((unused)), const c static int uart_cli_read(struct cli_def *cli __attribute__ ((unused)), void *buf, size_t count) { - uint32_t timeout = 0xffffff; - while (count && timeout) { - if (RINGBUF_COUNT(uart_ringbuf)) { - RINGBUF_READ(uart_ringbuf, *(uint8_t *) buf); - buf++; - count--; - } - timeout--; + for (int i = 0; i < count; ++i) { + while (ringbuf_read_char(&uart_ringbuf, (uint8_t *)(buf + i)) == 0) + osSemaphoreWait(uart_sem, osWaitForever); } - if (! timeout) return 0; - - return 1; + return count; } static int uart_cli_write(struct cli_def *cli __attribute__ ((unused)), const void *buf, size_t count) @@ -100,11 +128,8 @@ int control_mgmt_uart_dma_rx(mgmt_cli_dma_state_t state) { if (state == DMA_RX_START) { if (uart_ringbuf.rx_state != DMA_RX_START) { - memset((void *) uart_ringbuf.buf, 0, sizeof(uart_ringbuf.buf)); - - /* Start receiving data from the UART using DMA */ - HAL_UART_Receive_DMA(&huart_mgmt, (uint8_t *) uart_ringbuf.buf, sizeof(uart_ringbuf.buf)); - uart_ringbuf.ridx = 0; + ringbuf_init(&uart_ringbuf); + HAL_UART_Receive_DMA(&huart_mgmt, &uart_rx, 1); uart_ringbuf.rx_state = DMA_RX_START; } return 1; @@ -197,6 +222,8 @@ int cli_main(void) { static struct cli_def cli; + uart_sem = osSemaphoreCreate(osSemaphore(uart_sem), 0); + mgmt_cli_init(&cli); cli_set_auth_callback(&cli, check_auth); |