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path: root/drivers/gpio
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-rw-r--r--drivers/gpio/pca9555.c17
-rw-r--r--drivers/gpio/pca9555.h2
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpio/pca9555.c b/drivers/gpio/pca9555.c
index 496bbca04e..02b5abbdde 100644
--- a/drivers/gpio/pca9555.c
+++ b/drivers/gpio/pca9555.c
@@ -76,3 +76,20 @@ uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) {
}
return data;
}
+
+uint16_t pca9555_readAllPins(uint8_t slave_addr) {
+ uint8_t addr = SLAVE_TO_ADDR(slave_addr);
+
+ typedef union {
+ uint8_t u8[2];
+ uint16_t u16;
+ } data16;
+
+ data16 data;
+
+ i2c_status_t ret = i2c_readReg(addr, CMD_INPUT_0, &data.u8[0], sizeof(data), TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS) {
+ print("pca9555_readAllPins::FAILED\n");
+ }
+ return data.u16;
+}
diff --git a/drivers/gpio/pca9555.h b/drivers/gpio/pca9555.h
index ebb97e2f30..3341ec3eb5 100644
--- a/drivers/gpio/pca9555.h
+++ b/drivers/gpio/pca9555.h
@@ -53,3 +53,5 @@ void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf);
void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf);
uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port);
+
+uint16_t pca9555_readAllPins(uint8_t slave_addr);