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i2s_dma: Implementation of I2S + DMA wrapper library

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This commit is contained in:
sheinz 2016-08-16 10:10:35 +03:00
parent 3dcc4f14a9
commit 27135d6252
6 changed files with 322 additions and 3 deletions
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8
core/include/common_macros.h
View file

@ -37,6 +37,14 @@
#define VAL2FIELD_M(fieldname, value) (((value) & fieldname##_M) << fieldname##_S)
#define SET_FIELD_M(regbits, fieldname, value) (((regbits) & ~FIELD_MASK(fieldname)) | VAL2FIELD_M(fieldname, value))
/* Set bits in reg with specified mask.
*/
#define SET_MASK_BITS(reg, mask) (reg) |= (mask)
/* Clear bits in reg with specified mask
*/
#define CLEAR_MASK_BITS(reg, mask) (reg) &= ~(mask)
/* Use the IRAM macro to place functions into Instruction RAM (IRAM)
instead of flash (aka irom).

13
core/include/esp/iomux.h
View file

@ -43,10 +43,17 @@ inline static esp_reg_t gpio_iomux_reg(const uint8_t gpio_number)
return &(IOMUX.PIN[gpio_to_iomux(gpio_number)]);
}
inline static void iomux_set_function(uint8_t iomux_num, uint32_t func)
/**
* Set IOMUX function.
*
* @param iomux_num Index of IOMUX register. Can be converted from GPIO number
* with gpio_to_iomux.
* @param iomux_func GPIO function definition IOMUX_GPIOn_FUNC_*
*/
inline static void iomux_set_function(uint8_t iomux_num, uint32_t iomux_func)
{
uint32_t prev = IOMUX.PIN[iomux_num] & ~IOMUX_PIN_FUNC_MASK;
IOMUX.PIN[iomux_num] = IOMUX_FUNC(func) | prev;
IOMUX.PIN[iomux_num] = iomux_func | prev;
}
inline static void iomux_set_direction_flags(uint8_t iomux_num, uint32_t dir_flags)
@ -76,7 +83,7 @@ inline static void iomux_set_gpio_function(uint8_t gpio_number, bool output_enab
{
const uint8_t iomux_num = gpio_to_iomux(gpio_number);
const uint32_t func = iomux_num > 11 ? 0 : 3;
iomux_set_function(iomux_num, func);
iomux_set_function(iomux_num, IOMUX_FUNC(func));
iomux_set_direction_flags(iomux_num, output_enable ? IOMUX_PIN_OUTPUT_ENABLE : 0);
}