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esp8266: Expose pin object as a public structure for use as C pin API. 

This is an initial attempt at making a simple C pin API for writing
things like I2C drivers in C.
This commit is contained in:
Damien George 2016-02-11 11:41:58 +00:00 committed by Paul Sokolovsky
parent a1d072df81
commit 7059c8c23c
2 changed files with 15 additions and 10 deletions
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9
esp8266/modpyb.h
View File

@ -2,6 +2,15 @@ extern const mp_obj_type_t pyb_pin_type;
extern const mp_obj_type_t pyb_adc_type;
extern const mp_obj_type_t pyb_rtc_type;
typedef struct _pyb_pin_obj_t {
mp_obj_base_t base;
uint16_t pin_id;
uint16_t phys_port;
uint32_t periph;
uint16_t func;
} pyb_pin_obj_t;
uint mp_obj_get_pin(mp_obj_t pin_in);
pyb_pin_obj_t *mp_obj_get_pin_obj(mp_obj_t pin_in);
int pin_get(uint pin);
void pin_set(uint pin, int value);

16
esp8266/modpybpin.c
View File

@ -44,14 +44,6 @@
// Removed in SDK 1.1.0
//#define GPIO_PULL_DOWN (2)
typedef struct _pyb_pin_obj_t {
mp_obj_base_t base;
uint16_t pin_id;
uint16_t phys_port;
uint32_t periph;
uint16_t func;
} pyb_pin_obj_t;
STATIC const pyb_pin_obj_t pyb_pin_obj[] = {
{{&pyb_pin_type}, 0, 0, PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0},
{{&pyb_pin_type}, 1, 1, PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1},
@ -72,12 +64,16 @@ STATIC const pyb_pin_obj_t pyb_pin_obj[] = {
STATIC uint8_t pin_mode[16 + 1];
uint mp_obj_get_pin(mp_obj_t pin_in) {
pyb_pin_obj_t *mp_obj_get_pin_obj(mp_obj_t pin_in) {
if (mp_obj_get_type(pin_in) != &pyb_pin_type) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "expecting a pin"));
}
pyb_pin_obj_t *self = pin_in;
return self->phys_port;
return self;
}
uint mp_obj_get_pin(mp_obj_t pin_in) {
return mp_obj_get_pin_obj(pin_in)->phys_port;
}
int pin_get(uint pin) {