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Merge pull request #430 from StefanKrupop/aw9523_expander

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Add support for AW9523 GPIO expander
This commit is contained in:
philippe44
2024-09-12 11:25:31 +02:00
committed by GitHub
parent 33ef4b01e7 9d71b8ee26
commit ffaff5ac27
2 changed files with 29 additions and 2 deletions
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2
README.md
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@@ -308,7 +308,7 @@ The parameter "gpio_exp_config" is a semicolon (;) separated list with following
```
model=<model>,addr=<addr>,[,port=system|dac][,base=<n>][,count=<n>][,intr=<gpio>][,cs=<gpio>][,speed=<Hz>]
```
- model: pca9535, pca85xx, mcp23017 and mcp23s17 (SPI version)
- model: pca9535, pca85xx, mcp23017, aw9523 and mcp23s17 (SPI version)
- addr: chip i2c/spi address (decimal)
- port (I2C): use either "system" port (shared with display for example) or "dac" port (system is default)
- cs (SPI): gpio used for Chip Select

27
components/services/gpio_exp.c
View File

@@ -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 +680,24 @@ 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) {
// Reading both registers in one go does not seem to reset IRQ correctly
uint8_t port1 = i2c_read(self->phy.port, self->phy.addr, 0x00, 1);
return (i2c_read(self->phy.port, self->phy.addr, 0x01, 1) << 8) | port1;
}
static void aw9523_write(gpio_exp_t* self) {
i2c_write(self->phy.port, self->phy.addr, 0x02, self->shadow, 2);
}
/***************************************************************************************
I2C low level
***************************************************************************************/