From e9bd7d7ad308f9c72c86863bf9f19382c7e2d892 Mon Sep 17 00:00:00 2001 From: David Hoelscher Date: Wed, 17 Jan 2024 07:05:38 -0600 Subject: I2C driver cleanup (#21273) * remove i2c_start and i2c_stop from i2c drivers * remove static i2c_address variable from chibios i2c driver --- keyboards/ferris/0_2/matrix.c | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) (limited to 'keyboards/ferris') diff --git a/keyboards/ferris/0_2/matrix.c b/keyboards/ferris/0_2/matrix.c index af4b045eb8..cf26385f4c 100644 --- a/keyboards/ferris/0_2/matrix.c +++ b/keyboards/ferris/0_2/matrix.c @@ -42,9 +42,7 @@ extern i2c_status_t mcp23017_status; // All address pins of the mcp23017 are connected to the ground on the ferris // | 0 | 1 | 0 | 0 | A2 | A1 | A0 | // | 0 | 1 | 0 | 0 | 0 | 0 | 0 | -#define I2C_ADDR 0b0100000 -#define I2C_ADDR_WRITE ((I2C_ADDR << 1) | I2C_WRITE) -#define I2C_ADDR_READ ((I2C_ADDR << 1) | I2C_READ) +#define I2C_ADDR (0b0100000 << 1) // Register addresses // See https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library/blob/master/Adafruit_MCP23017.h @@ -77,9 +75,9 @@ uint8_t init_mcp23017(void) { // - driving : output : 0 // This means: we will read all the bits on GPIOA // This means: we will write to the pins 0-4 on GPIOB (in select_rows) - uint8_t buf[] = {IODIRA, 0b11111111, 0b11110000}; + uint8_t buf[] = {0b11111111, 0b11110000}; print("before transmit\n"); - mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); + mcp23017_status = i2c_writeReg(I2C_ADDR, IODIRA, buf, sizeof(buf), MCP23017_I2C_TIMEOUT) uprintf("after transmit %i\n", mcp23017_status); if (!mcp23017_status) { // set pull-up @@ -88,8 +86,7 @@ uint8_t init_mcp23017(void) { // - driving : off : 0 // This means: we will read all the bits on GPIOA // This means: we will write to the pins 0-4 on GPIOB (in select_rows) - uint8_t pullup_buf[] = {GPPUA, 0b11111111, 0b11110000}; - mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, pullup_buf, sizeof(pullup_buf), MCP23017_I2C_TIMEOUT); + mcp23017_status = i2c_writeReg(I2C_ADDR, GPPUA, buf, sizeof(buf), MCP23017_I2C_TIMEOUT) uprintf("after transmit2 %i\n", mcp23017_status); } return mcp23017_status; @@ -189,18 +186,13 @@ static matrix_row_t read_cols(uint8_t row) { if (mcp23017_status) { // if there was an error return 0; } else { - uint8_t buf[] = {MCP23017_GPIOA}; - mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); // We read all the pins on GPIOA. // The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero. // The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys. // Since the pins connected to eact columns are sequential, and counting from zero up (col 5 -> GPIOA0, col 6 -> GPIOA1 and so on), the only transformation needed is a bitwise not to swap all zeroes and ones. uint8_t data[] = {0}; - if (!mcp23017_status) { - mcp23017_status = i2c_receive(I2C_ADDR_READ, data, sizeof(data), MCP23017_I2C_TIMEOUT); - data[0] = ~(data[0]); - } - return data[0]; + mcp23017_status = i2c_readReg(I2C_ADDR, MCP23017_GPIOA, data, sizeof(data), MCP23017_I2C_TIMEOUT); + return ~data[0]; } } } @@ -244,8 +236,8 @@ static void select_row(uint8_t row) { } else { // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one. // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus. - uint8_t buf[] = {MCP23017_GPIOB, 0xFF & ~(1 << (row - MATRIX_ROWS_PER_SIDE))}; - mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, buf, sizeof(buf), I2C_TIMEOUT); + uint8_t buf[] = {0xFF & ~(1 << (row - MATRIX_ROWS_PER_SIDE))}; + mcp23017_status = i2c_writeReg(I2C_ADDR, MCP23017_GPIOB, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); } } } -- cgit v1.2.3