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stmhal: Improved usart module a bit.

This commit is contained in:
Damien George 2014-04-14 01:45:58 +01:00
parent 6dba016a56
commit 7e5be0b1b4
2 changed files with 73 additions and 25 deletions
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84
stmhal/usart.c
View File

@ -19,7 +19,7 @@ struct _pyb_usart_obj_t {
pyb_usart_obj_t *pyb_usart_global_debug = NULL;
void usart_init(pyb_usart_obj_t *usart_obj, uint32_t baudrate) {
bool usart_init(pyb_usart_obj_t *usart_obj, uint32_t baudrate) {
USART_TypeDef *USARTx=NULL;
uint32_t GPIO_Pin=0;
@ -27,50 +27,74 @@ void usart_init(pyb_usart_obj_t *usart_obj, uint32_t baudrate) {
GPIO_TypeDef* GPIO_Port=NULL;
switch (usart_obj->usart_id) {
case PYB_USART_NONE:
return;
// USART1 is on PA9/PA10, PB6/PB7
case PYB_USART_1:
USARTx = USART1;
GPIO_Port = GPIOA;
GPIO_AF_USARTx = GPIO_AF7_USART1;
#if defined(PYBV10)
GPIO_Port = GPIOB;
GPIO_Pin = GPIO_PIN_6 | GPIO_PIN_7;
#else
GPIO_Port = GPIOA;
GPIO_Pin = GPIO_PIN_9 | GPIO_PIN_10;
#endif
__USART1_CLK_ENABLE();
break;
#if !defined(PYBV10)
// USART2 is on PA2/PA3, PD5/PD6
case PYB_USART_2:
USARTx = USART2;
GPIO_AF_USARTx = GPIO_AF7_USART2;
GPIO_Port = GPIOD;
GPIO_AF_USARTx = GPIO_AF7_USART2;
GPIO_Pin = GPIO_PIN_5 | GPIO_PIN_6;
__USART2_CLK_ENABLE();
break;
#endif
// USART3 is on PB10/PB11, PC10/PC11, PD8/PD9
case PYB_USART_3:
USARTx = USART3;
#if defined(PYBV3) || defined(PYBV4)
GPIO_Port = GPIOB;
GPIO_AF_USARTx = GPIO_AF7_USART3;
#if defined(PYBV3) || defined(PYBV4) | defined(PYBV10)
GPIO_Port = GPIOB;
GPIO_Pin = GPIO_PIN_10 | GPIO_PIN_11;
#else
GPIO_Port = GPIOD;
GPIO_AF_USARTx = GPIO_AF7_USART3;
GPIO_Pin = GPIO_PIN_8 | GPIO_PIN_9;
#endif
__USART3_CLK_ENABLE();
break;
// USART4 is on PA0/PA1, PC10/PC11
case PYB_USART_4:
USARTx = UART4;
GPIO_AF_USARTx = GPIO_AF8_UART4;
GPIO_Port = GPIOA;
GPIO_Pin = GPIO_PIN_0 | GPIO_PIN_1;
__UART4_CLK_ENABLE();
break;
// USART6 is on PC6/PC7
case PYB_USART_6:
USARTx = USART6;
GPIO_AF_USARTx = GPIO_AF8_USART6;
GPIO_Port = GPIOC;
GPIO_AF_USARTx = GPIO_AF8_USART6;
GPIO_Pin = GPIO_PIN_6 | GPIO_PIN_7;
__USART6_CLK_ENABLE();
break;
default:
return false;
}
// Initialize USARTx
@ -94,6 +118,8 @@ void usart_init(pyb_usart_obj_t *usart_obj, uint32_t baudrate) {
uh->Init.HwFlowCtl = UART_HWCONTROL_NONE;
uh->Init.OverSampling = UART_OVERSAMPLING_16;
HAL_UART_Init(uh);
return true;
}
bool usart_rx_any(pyb_usart_obj_t *usart_obj) {
@ -148,17 +174,35 @@ STATIC mp_obj_t usart_obj_make_new(mp_obj_t type_in, uint n_args, uint n_kw, con
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Usart accepts 2 arguments"));
}
if (mp_obj_get_int(args[0]) > PYB_USART_MAX) {
return mp_const_none;
}
// create object
pyb_usart_obj_t *o = m_new_obj(pyb_usart_obj_t);
o->base.type = &pyb_usart_type;
o->usart_id = mp_obj_get_int(args[0]);
o->is_enabled = true;
/* init USART */
usart_init(o, mp_obj_get_int(args[1]));
// work out port
o->usart_id = 0;
if (MP_OBJ_IS_STR(args[0])) {
const char *port = mp_obj_str_get_str(args[0]);
if (strcmp(port, "XA") == 0) {
o->usart_id = PYB_USART_XA;
} else if (strcmp(port, "XB") == 0) {
o->usart_id = PYB_USART_XB;
} else if (strcmp(port, "YA") == 0) {
o->usart_id = PYB_USART_YA;
} else if (strcmp(port, "YB") == 0) {
o->usart_id = PYB_USART_YB;
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Usart port %s does not exist", port));
}
} else if (MP_OBJ_IS_INT(args[0])) {
o->usart_id = mp_obj_get_int(args[0]);
}
// init USART (if it fails, it's because the port doesn't exist)
if (!usart_init(o, mp_obj_get_int(args[1]))) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Usart port %d does not exist", o->usart_id));
}
o->is_enabled = true;
return o;
}

14
stmhal/usart.h
View File

@ -3,13 +3,17 @@ typedef enum {
PYB_USART_1 = 1,
PYB_USART_2 = 2,
PYB_USART_3 = 3,
PYB_USART_6 = 4,
PYB_USART_MAX = 4,
PYB_USART_4 = 4,
PYB_USART_5 = 5,
PYB_USART_6 = 6,
//PYB_USART_XA = // USART4 on X1, X2 = PA0, PA1
#if defined(PYBV10)
PYB_USART_XA = 4, // USART4 on X1, X2 = PA0, PA1
PYB_USART_XB = 1, // USART1 on X9, X10 = PB6, PB7
PYB_USART_YA = 4, // USART6 on Y1, Y2 = PC6, PC7
PYB_USART_YA = 6, // USART6 on Y1, Y2 = PC6, PC7
PYB_USART_YB = 3, // USART3 on Y9, Y10 = PB10, PB11
#endif
} pyb_usart_t;
typedef struct _pyb_usart_obj_t pyb_usart_obj_t;
@ -17,7 +21,7 @@ typedef struct _pyb_usart_obj_t pyb_usart_obj_t;
extern pyb_usart_obj_t *pyb_usart_global_debug;
extern const mp_obj_type_t pyb_usart_type;
void usart_init(pyb_usart_obj_t *usart_obj, uint32_t baudrate);
bool usart_init(pyb_usart_obj_t *usart_obj, uint32_t baudrate);
bool usart_rx_any(pyb_usart_obj_t *usart_obj);
int usart_rx_char(pyb_usart_obj_t *usart_obj);
void usart_tx_str(pyb_usart_obj_t *usart_obj, const char *str);