Initial LIN support

src/common/exec.c

@@ -211,6 +211,7 @@ static struct cmd_map {
  { T_THREEWIRE, cmd_mode_init },
  { T_FLASH, cmd_mode_init },
  { T_WIEGAND, cmd_mode_init },
+ { T_LIN, cmd_mode_init },
  { 0, NULL }
 };
 

src/common/mode_config.h

@@ -64,6 +64,7 @@ typedef struct {
  uint32_t dev_speed;
  uint8_t dev_parity;
  uint8_t dev_stop_bit;
+ uint8_t bus_mode;
 } uart_config_t;
 
 typedef struct {

src/drv/stm32cube/bsp_uart.c

@@ -184,14 +184,36 @@ bsp_status_t bsp_uart_init(bsp_dev_uart_t dev_num, mode_config_proto_t* mode_con
  huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart->Init.Mode = UART_MODE_TX_RX;
 
- status = HAL_UART_Init(huart);
+ if(mode_conf->config.uart.bus_mode == BSP_UART_MODE_UART) {
+ status = HAL_UART_Init(huart);
+ } else {
+ status = HAL_LIN_Init(huart, UART_LINBREAKDETECTLENGTH_11B);
+ }
 
  /* Dummy read to flush old character */
  dummy_read = huart->Instance->DR;
 
  return status;
 }
 
+/**
+ * @brief Sends a LIN break.
+ * @param dev_num: UART dev num.
+ * @retval status of the transfer.
+ */
+bsp_status_t bsp_lin_break(bsp_dev_uart_t dev_num)
+{
+ UART_HandleTypeDef* huart;
+ huart = &uart_handle[dev_num];
+
+ bsp_status_t status;
+ status = HAL_LIN_SendBreak(huart);
+ if(status != BSP_OK) {
+ uart_error(dev_num);
+ }
+ return status;
+}
+
 /**
  * @brief De-initialize the UART comunication bus
  * @param dev_num: UART dev num.

src/drv/stm32cube/bsp_uart.h

@@ -24,6 +24,9 @@ typedef enum {
  BSP_DEV_UART_END = 2
 } bsp_dev_uart_t;
 
+#define BSP_UART_MODE_UART 0
+#define BSP_UART_MODE_LIN 1
+
 bsp_status_t bsp_uart_init(bsp_dev_uart_t dev_num, mode_config_proto_t* mode_conf);
 bsp_status_t bsp_uart_deinit(bsp_dev_uart_t dev_num);
 
@@ -36,4 +39,6 @@ bsp_status_t bsp_uart_rxne(bsp_dev_uart_t dev_num);
 
 uint32_t bsp_uart_get_final_baudrate(bsp_dev_uart_t dev_num);
 
+bsp_status_t bsp_lin_break(bsp_dev_uart_t dev_num);
+
 #endif /* _BSP_UART_H_ */

src/hydrabus/commands.c

@@ -153,6 +153,7 @@ t_token_dict tl_dict[] = {
  { T_TS2, "ts2" },
  { T_SJW, "sjw" },
  { T_WIEGAND, "wiegand" },
+ { T_LIN, "lin" },
  /* Developer warning add new command(s) here */
 
  /* BP-compatible commands */
@@ -506,6 +507,82 @@ t_token tokens_uart[] = {
  { }
 };
 
+#define LIN_PARAMETERS \
+ {\
+ T_DEVICE,\
+ .arg_type = T_ARG_UINT,\
+ .help = "LIN device (1/2)"\
+ },\
+
+t_token tokens_mode_lin[] = {
+ {
+ T_SHOW,
+ .subtokens = tokens_mode_show,
+ .help = "Show LIN parameters"
+ },
+ {
+ T_TRIGGER,
+ .subtokens = tokens_mode_trigger,
+ .help = "Setup LIN trigger"
+ },
+ LIN_PARAMETERS
+ /* LIN-specific commands */
+ {
+ T_READ,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Read byte (repeat with :<num>)"
+ },
+ {
+ T_HD,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Read byte (repeat with :<num>) and print hexdump"
+ },
+ {
+ T_WRITE,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Write byte (repeat with :<num>)"
+ },
+ {
+ T_ARG_UINT,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Write byte (repeat with :<num>)"
+ },
+ {
+ T_ARG_STRING,
+ .help = "Write string"
+ },
+ /* BP commands */
+ {
+ T_LEFT_SQ,
+ .help = "Send a LIN break"
+ },
+ {
+ T_AMPERSAND,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Delay 1 usec (repeat with :<num>)"
+ },
+ {
+ T_PERCENT,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Delay 1 msec (repeat with :<num>)"
+ },
+ {
+ T_TILDE,
+ .flags = T_FLAG_SUFFIX_TOKEN_DELIM_INT,
+ .help = "Write a random byte (repeat with :<num>)"
+ },
+ {
+ T_EXIT,
+ .help = "Exit LIN mode"
+ },
+ { }
+};
+
+t_token tokens_lin[] = {
+ LIN_PARAMETERS
+ { }
+};
+
 #define CAN_PARAMETERS \
  {\
  T_DEVICE,\
@@ -1775,6 +1852,12 @@ t_token tl_tokens[] = {
  .subtokens = tokens_wiegand,
  .help = "Wiegand mode"
  },
+ {
+ T_LIN,
+ .subtokens = tokens_lin,
+ .help = "LIN mode",
+ .help_full = "Configuration: uart [device (1/2)>\r\nInteraction: <read/write (value:repeat)>"
+ },
  {
  T_DEBUG,
  .subtokens = tokens_debug,

src/hydrabus/commands.h

@@ -145,6 +145,7 @@ enum {
  T_TS2,
  T_SJW,
  T_WIEGAND,
+ T_LIN,
  /* Developer warning add new command(s) here */
 
  /* BP-compatible commands */

src/hydrabus/hydrabus.mk

@@ -30,6 +30,7 @@ HYDRABUSSRC = hydrabus/hydrabus.c \
  hydrabus/hydrabus_sd.c \
  hydrabus/hydrabus_trigger.c \
  hydrabus/hydrabus_mode_wiegand.c \
+ hydrabus/hydrabus_mode_lin.c
 
 # Required include directories
 HYDRABUSINC = ./hydrabus

src/hydrabus/hydrabus_mode.c

@@ -49,6 +49,7 @@ extern const mode_exec_t mode_threewire_exec;
 extern const mode_exec_t mode_can_exec;
 extern const mode_exec_t mode_flash_exec;
 extern const mode_exec_t mode_wiegand_exec;
+extern const mode_exec_t mode_lin_exec;
 extern t_token tokens_mode_spi[];
 extern t_token tokens_mode_i2c[];
 extern t_token tokens_mode_uart[];
@@ -62,6 +63,7 @@ extern t_token tokens_mode_threewire[];
 extern t_token tokens_mode_can[];
 extern t_token tokens_mode_flash[];
 extern t_token tokens_mode_wiegand[];
+extern t_token tokens_mode_lin[];
 
 static struct {
  int token;
@@ -81,6 +83,7 @@ static struct {
  { T_CAN, tokens_mode_can, &mode_can_exec },
  { T_FLASH, tokens_mode_flash, &mode_flash_exec },
  { T_WIEGAND, tokens_mode_wiegand, &mode_wiegand_exec },
+ { T_LIN, tokens_mode_lin, &mode_lin_exec },
 };
 
 const char hydrabus_mode_str_cs_enabled[] = "/CS ENABLED\r\n";