From a2351ba0d51412c43c2a9699fee1d445af5f28ff Mon Sep 17 00:00:00 2001 From: Stefan Krupop Date: Thu, 25 Jul 2024 01:13:14 +0200 Subject: [PATCH] Add support for AW9523 port expander --- components/services/gpio_exp.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/components/services/gpio_exp.c b/components/services/gpio_exp.c index 2f86ff33..126b7b27 100644 --- a/components/services/gpio_exp.c +++ b/components/services/gpio_exp.c @@ -83,6 +83,10 @@ static void mcp23s17_set_direction(gpio_exp_t* self); static uint32_t mcp23s17_read(gpio_exp_t* self); static void mcp23s17_write(gpio_exp_t* self); +static void aw9523_set_direction(gpio_exp_t* self); +static uint32_t aw9523_read(gpio_exp_t* self); +static void aw9523_write(gpio_exp_t* self); + static void service_handler(void *arg); static void debounce_handler( TimerHandle_t xTimer ); @@ -130,6 +134,11 @@ static const struct gpio_exp_model_s { .set_pull_mode = mcp23s17_set_pull_mode, .read = mcp23s17_read, .write = mcp23s17_write, }, + { .model = "aw9523", + .trigger = GPIO_INTR_LOW_LEVEL, + .set_direction = aw9523_set_direction, + .read = aw9523_read, + .write = aw9523_write, }, }; static EXT_RAM_ATTR uint8_t n_expanders; @@ -671,6 +680,22 @@ static void mcp23s17_write(gpio_exp_t* self) { spi_write(self->spi_handle, self->phy.addr, 0x12, self->shadow, 2); } +/**************************************************************************************** + * AW9523 family : direction, read and write + */ +static void aw9523_set_direction(gpio_exp_t* self) { + i2c_write(self->phy.port, self->phy.addr, 0x04, self->r_mask, 2); + i2c_write(self->phy.port, self->phy.addr, 0x06, ~self->r_mask, 2); +} + +static uint32_t aw9523_read(gpio_exp_t* self) { + return i2c_read(self->phy.port, self->phy.addr, 0x00, 2); +} + +static void aw9523_write(gpio_exp_t* self) { + i2c_write(self->phy.port, self->phy.addr, 0x02, self->shadow, 2); +} + /*************************************************************************************** I2C low level ***************************************************************************************/