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fix pca8575 - release

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This commit is contained in:
Philippe G
2021-12-17 21:32:03 -08:00
parent f330314795
commit 1c92fdcc96
1 changed files with 33 additions and 27 deletions
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54
components/services/gpio_exp.c
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@@ -61,23 +61,22 @@ static void IRAM_ATTR intr_isr_handler(void* arg);
static gpio_exp_t* find_expander(gpio_exp_t *expander, int *gpio);
static void pca9535_set_direction(gpio_exp_t* self);
static int pca9535_read(gpio_exp_t* self);
static uint32_t pca9535_read(gpio_exp_t* self);
static void pca9535_write(gpio_exp_t* self);
static void pca85xx_set_direction(gpio_exp_t* self);
static int pca85xx_read(gpio_exp_t* self);
static uint32_t pca85xx_read(gpio_exp_t* self);
static void pca85xx_write(gpio_exp_t* self);
static esp_err_t mcp23017_init(gpio_exp_t* self);
static void mcp23017_set_pull_mode(gpio_exp_t* self);
static void mcp23017_set_direction(gpio_exp_t* self);
static int mcp23017_read(gpio_exp_t* self);
static uint32_t mcp23017_read(gpio_exp_t* self);
static void mcp23017_write(gpio_exp_t* self);
static esp_err_t mcp23s17_init(gpio_exp_t* self);
static void mcp23s17_set_pull_mode(gpio_exp_t* self);
static void mcp23s17_set_direction(gpio_exp_t* self);
static int mcp23s17_read(gpio_exp_t* self);
static uint32_t mcp23s17_read(gpio_exp_t* self);
static void mcp23s17_write(gpio_exp_t* self);
static void service_handler(void *arg);
@@ -94,7 +93,7 @@ static const struct gpio_exp_model_s {
char *model;
gpio_int_type_t trigger;
esp_err_t (*init)(gpio_exp_t* self);
int (*read)(gpio_exp_t* self);
uint32_t (*read)(gpio_exp_t* self);
void (*write)(gpio_exp_t* self);
void (*set_direction)(gpio_exp_t* self);
void (*set_pull_mode)(gpio_exp_t* self);
@@ -106,7 +105,6 @@ static const struct gpio_exp_model_s {
.write = pca9535_write, },
{ .model = "pca85xx",
.trigger = GPIO_INTR_NEGEDGE,
.set_direction = pca85xx_set_direction,
.read = pca85xx_read,
.write = pca85xx_write, },
{ .model = "mcp23017",
@@ -215,7 +213,7 @@ gpio_exp_t* gpio_exp_create(const gpio_exp_config_t *config) {
gpio_intr_enable(config->intr);
}
ESP_LOGI(TAG, "Create GPIO expander %s at base %u with INT %u at @%x on port/host %d/%d", config->model, config->base, config->intr, config->phy.addr, config->phy.port, config->phy.host);
ESP_LOGI(TAG, "Create GPIO expander %s at base %u with INT %d at @%x on port/host %d/%d", config->model, config->base, config->intr, config->phy.addr, config->phy.port, config->phy.host);
return expander;
}
@@ -475,7 +473,7 @@ void service_handler(void *arg) {
}
// check if we have some other pending requests
if (xQueueReceive(message_queue, &request, 0) == pdTRUE) {
while (xQueueReceive(message_queue, &request, 0) == pdTRUE) {
esp_err_t err = gpio_exp_set_level(request.gpio, request.level, true, request.expander);
if (err != ESP_OK) ESP_LOGW(TAG, "Can't execute async GPIO %d write request (%d)", request.gpio, err);
}
@@ -508,7 +506,7 @@ static void pca9535_set_direction(gpio_exp_t* self) {
i2c_write(self->phy.port, self->phy.addr, 0x06, self->r_mask, 2);
}
static int pca9535_read(gpio_exp_t* self) {
static uint32_t pca9535_read(gpio_exp_t* self) {
return i2c_read(self->phy.port, self->phy.addr, 0x00, 2);
}
@@ -519,18 +517,24 @@ static void pca9535_write(gpio_exp_t* self) {
/****************************************************************************************
* PCA85xx family : read and write
*/
static void pca85xx_set_direction(gpio_exp_t* self) {
// all inputs must be set to 1 (open drain) and output are left open as well
i2c_write(self->phy.port, self->phy.addr, 0xff, self->r_mask | self->w_mask, true);
}
static int pca85xx_read(gpio_exp_t* self) {
return i2c_read(self->phy.port, self->phy.addr, 0xff, 2);
static uint32_t pca85xx_read(gpio_exp_t* self) {
// must return the full set of pins, not just inputs
uint32_t data = i2c_read(self->phy.port, self->phy.addr, 0xff, 2);
return (data & self->r_mask) | (self->shadow & ~self->r_mask);
}
static void pca85xx_write(gpio_exp_t* self) {
// all input must be set to 1 (open drain)
i2c_write(self->phy.port, self->phy.addr, 0xff, self->shadow | self->r_mask, true);
/*
There is no good option with this chip: normally, unused pin should be set to input
to avoid any conflict but then they float and create tons of suprious. So option 1 is
to le tthem float and option 2 is to set them as output to 0.
In addition, setting an output pin to 1 equals is making it an input and if this is
use to short a led (e.g.) instead of being the sink, the it generates a spurious
*/
// option 1
// i2c_write(self->phy.port, self->phy.addr, 0xff, (self->shadow & self->w_mask) | ~self->w_mask, 2);
// option 2
i2c_write(self->phy.port, self->phy.addr, 0xff, (self->shadow & self->w_mask) | self->r_mask, 2);
}
/****************************************************************************************
@@ -561,7 +565,7 @@ static void mcp23017_set_pull_mode(gpio_exp_t* self) {
i2c_write(self->phy.port, self->phy.addr, 0x0c, self->pullup, 2);
}
static int mcp23017_read(gpio_exp_t* self) {
static uint32_t mcp23017_read(gpio_exp_t* self) {
// read the pins value, not the stored one @interrupt
return i2c_read(self->phy.port, self->phy.addr, 0x12, 2);
}
@@ -600,7 +604,7 @@ static void mcp23s17_set_pull_mode(gpio_exp_t* self) {
spi_write(self->spi_handle, self->phy.addr, 0x0c, self->pullup, 2);
}
static int mcp23s17_read(gpio_exp_t* self) {
static uint32_t mcp23s17_read(gpio_exp_t* self) {
// read the pins value, not the stored one @interrupt
return spi_read(self->spi_handle, self->phy.addr, 0x12, 2);
}
@@ -623,7 +627,7 @@ static esp_err_t i2c_write(uint8_t port, uint8_t addr, uint8_t reg, uint32_t dat
i2c_master_write_byte(cmd, (addr << 1) | I2C_MASTER_WRITE, I2C_MASTER_NACK);
if (reg != 0xff) i2c_master_write_byte(cmd, reg, I2C_MASTER_NACK);
// works with out endianness
// works with our endianness
if (len > 1) i2c_master_write(cmd, (uint8_t*) &data, len, I2C_MASTER_NACK);
else i2c_master_write_byte(cmd, data, I2C_MASTER_NACK);
@@ -647,16 +651,18 @@ static uint32_t i2c_read(uint8_t port, uint8_t addr, uint8_t reg, int len) {
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (addr << 1) | I2C_MASTER_WRITE, I2C_MASTER_NACK);
// when using a register, write it's value then the device address again
if (reg != 0xff) {
i2c_master_write_byte(cmd, (addr << 1) | I2C_MASTER_WRITE, I2C_MASTER_NACK);
i2c_master_write_byte(cmd, reg, I2C_MASTER_NACK);
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (addr << 1) | I2C_MASTER_READ, I2C_MASTER_NACK);
} else {
i2c_master_write_byte(cmd, (addr << 1) | I2C_MASTER_READ, I2C_MASTER_NACK);
}
// works with out endianness
// works with our endianness
if (len > 1) i2c_master_read(cmd, (uint8_t*) &data, len, I2C_MASTER_LAST_NACK);
else i2c_master_read_byte(cmd, (uint8_t*) &data, I2C_MASTER_NACK);