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Add gpio_set_iomux_function().

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This commit is contained in:
ourairquality 2016-08-15 22:23:45 +10:00
parent 8405b989f9
commit 4b77138f71
2 changed files with 20 additions and 15 deletions
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25
core/esp_spi.c
View file

@ -30,32 +30,27 @@
static bool _minimal_pins[2] = {false, false}; static bool _minimal_pins[2] = {false, false};
inline static void _set_pin_function(uint8_t pin, uint32_t function)
{
iomux_set_function(gpio_to_iomux(pin), function);
}
bool spi_init(uint8_t bus, spi_mode_t mode, uint32_t freq_divider, bool msb, spi_endianness_t endianness, bool minimal_pins) bool spi_init(uint8_t bus, spi_mode_t mode, uint32_t freq_divider, bool msb, spi_endianness_t endianness, bool minimal_pins)
{ {
switch (bus) switch (bus)
{ {
case 0: case 0:
_set_pin_function(_SPI0_MISO_GPIO, _SPI0_FUNC); gpio_set_iomux_function(_SPI0_MISO_GPIO, _SPI0_FUNC);
_set_pin_function(_SPI0_MOSI_GPIO, _SPI0_FUNC); gpio_set_iomux_function(_SPI0_MOSI_GPIO, _SPI0_FUNC);
_set_pin_function(_SPI0_SCK_GPIO, _SPI0_FUNC); gpio_set_iomux_function(_SPI0_SCK_GPIO, _SPI0_FUNC);
if (!minimal_pins) if (!minimal_pins)
{ {
_set_pin_function(_SPI0_HD_GPIO, _SPI0_FUNC); gpio_set_iomux_function(_SPI0_HD_GPIO, _SPI0_FUNC);
_set_pin_function(_SPI0_WP_GPIO, _SPI0_FUNC); gpio_set_iomux_function(_SPI0_WP_GPIO, _SPI0_FUNC);
_set_pin_function(_SPI0_CS0_GPIO, _SPI0_FUNC); gpio_set_iomux_function(_SPI0_CS0_GPIO, _SPI0_FUNC);
} }
break; break;
case 1: case 1:
_set_pin_function(_SPI1_MISO_GPIO, _SPI1_FUNC); gpio_set_iomux_function(_SPI1_MISO_GPIO, _SPI1_FUNC);
_set_pin_function(_SPI1_MOSI_GPIO, _SPI1_FUNC); gpio_set_iomux_function(_SPI1_MOSI_GPIO, _SPI1_FUNC);
_set_pin_function(_SPI1_SCK_GPIO, _SPI1_FUNC); gpio_set_iomux_function(_SPI1_SCK_GPIO, _SPI1_FUNC);
if (!minimal_pins) if (!minimal_pins)
_set_pin_function(_SPI1_CS0_GPIO, _SPI1_FUNC); gpio_set_iomux_function(_SPI1_CS0_GPIO, _SPI1_FUNC);
break; break;
default: default:
return false; return false;

10
core/include/esp/gpio.h
View file

@ -143,6 +143,16 @@ static inline gpio_inttype_t gpio_get_interrupt(const uint8_t gpio_num)
return (gpio_inttype_t)FIELD2VAL(GPIO_CONF_INTTYPE, GPIO.CONF[gpio_num]); return (gpio_inttype_t)FIELD2VAL(GPIO_CONF_INTTYPE, GPIO.CONF[gpio_num]);
} }
/* Set GPIO I/O Mux function.
* The 'func' is an IOMUX_GPIO<n>_FUNC_<function> value, see iomux_regs.h
*/
inline static void gpio_set_iomux_function(const uint8_t gpio_num, uint32_t func)
{
uint8_t iomux_num = gpio_to_iomux(gpio_num);
uint32_t prev = IOMUX.PIN[iomux_num] & ~IOMUX_PIN_FUNC_MASK;
IOMUX.PIN[iomux_num] = func | prev;
}
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif