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Add ferris 0.2 (#12133)

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Co-authored-by: Ryan <fauxpark@gmail.com>
This commit is contained in:
Pierre Chevalier 2021-04-18 16:51:45 +01:00 • committed by GitHub
parent c32264d9b7
commit d0973e1cfb
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GPG key ID: 4AEE18F83AFDEB23
17 changed files with 644 additions and 55 deletions
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77
keyboards/ferris/0_1/matrix.c
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@ -72,40 +72,25 @@ uint8_t init_mcp23017(void) {
// - unused : input : 1
// - input : input : 1
// - driving : output : 0
mcp23017_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (mcp23017_status) goto out;
mcp23017_status = i2c_write(IODIRA, I2C_TIMEOUT);
if (mcp23017_status) goto out;
// This means: we will read all the bits on GPIOA
mcp23017_status = i2c_write(0b11111111, I2C_TIMEOUT);
if (mcp23017_status) goto out;
// This means: we will write to the pins 0-4 on GPIOB (in select_rows)
mcp23017_status = i2c_write(0b11110000, I2C_TIMEOUT);
if (mcp23017_status) goto out;
i2c_stop();
// set pull-up
// - unused : on : 1
// - input : on : 1
// - driving : off : 0
mcp23017_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (mcp23017_status) goto out;
mcp23017_status = i2c_write(GPPUA, I2C_TIMEOUT);
if (mcp23017_status) goto out;
// This means: we will read all the bits on GPIOA
mcp23017_status = i2c_write(0b11111111, I2C_TIMEOUT);
if (mcp23017_status) goto out;
// This means: we will write to the pins 0-4 on GPIOB (in select_rows)
mcp23017_status = i2c_write(0b11110000, I2C_TIMEOUT);
if (mcp23017_status) goto out;
out:
i2c_stop();
uint8_t buf[] = {IODIRA, 0b11111111, 0b11110000};
mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, buf, sizeof(buf), I2C_TIMEOUT);
if (!mcp23017_status) {
// set pull-up
// - unused : on : 1
// - input : on : 1
// - 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), I2C_TIMEOUT);
}
return mcp23017_status;
}
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS]; // debounced values
static matrix_row_t matrix[MATRIX_ROWS]; // debounced values
static matrix_row_t read_cols(uint8_t row);
static void init_cols(void);
@ -124,7 +109,7 @@ void matrix_init_custom(void) {
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
matrix[i] = 0;
}
}
@ -217,25 +202,18 @@ static matrix_row_t read_cols(uint8_t row) {
if (mcp23017_status) { // if there was an error
return 0;
} else {
uint8_t data = 0;
mcp23017_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (mcp23017_status) goto out;
mcp23017_status = i2c_write(GPIOA, I2C_TIMEOUT);
if (mcp23017_status) goto out;
mcp23017_status = i2c_start(I2C_ADDR_READ, I2C_TIMEOUT);
if (mcp23017_status) goto out;
mcp23017_status = i2c_read_nack(I2C_TIMEOUT);
if (mcp23017_status < 0) goto out;
uint8_t buf[] = {GPIOA};
mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, buf, sizeof(buf), 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.
data = ~((uint8_t)mcp23017_status);
mcp23017_status = I2C_STATUS_SUCCESS;
out:
i2c_stop();
// return reverse_bits(data, MATRIX_COLS_PER_SIDE);
return data;
uint8_t data[] = {0};
if (!mcp23017_status) {
mcp23017_status = i2c_receive(I2C_ADDR_READ, data, sizeof(data), I2C_TIMEOUT);
data[0] = ~(data[0]);
}
return data[0];
}
}
}
@ -266,17 +244,10 @@ static void select_row(uint8_t row) {
if (mcp23017_status) { // if there was an error
// do nothing
} else {
mcp23017_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
if (mcp23017_status) goto out;
mcp23017_status = i2c_write(GPIOB, I2C_TIMEOUT);
if (mcp23017_status) goto out;
// 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.
mcp23017_status = i2c_write(0xFF & ~(1 << (row - MATRIX_ROWS_PER_SIDE)), I2C_TIMEOUT);
if (mcp23017_status) goto out;
out:
i2c_stop();
uint8_t buf[] = {GPIOB, 0xFF & ~(1 << (row - MATRIX_ROWS_PER_SIDE))};
mcp23017_status = i2c_transmit(I2C_ADDR_WRITE, buf, sizeof(buf), I2C_TIMEOUT);
}
}
}