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handwired/dactyl - Refactor use of legacy i2c implementation (#14344)

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Joel Challis 2021-09-08 02:23:11 +01:00 • committed by GitHub
parent 04c0704b28
commit 60c5bd7b5e
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6 changed files with 52 additions and 442 deletions
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99
keyboards/handwired/dactyl/matrix.c
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@ -25,7 +25,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "util.h"
#include "matrix.h"
#include "dactyl.h"
#include "i2cmaster.h"
#include "i2c_master.h"
#include "timer.h"
@ -147,9 +147,6 @@ void init_expander(void) {
#endif
}
expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
expander_status = i2c_write(IODIRA); if (expander_status) goto out;
/*
Pin direction and pull-up depends on both the diode direction
and on whether the column register is GPIOA or GPIOB
@ -164,50 +161,65 @@ void init_expander(void) {
#if (EXPANDER_COL_REGISTER == GPIOA)
# if (DIODE_DIRECTION == COL2ROW)
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
expander_status = i2c_write(0); if (expander_status) goto out;
uint8_t direction[2] = {
expander_input_pin_mask,
0,
};
# elif (DIODE_DIRECTION == ROW2COL)
expander_status = i2c_write(0); if (expander_status) goto out;
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
uint8_t direction[2] = {
0,
expander_input_pin_mask,
};
# endif
#elif (EXPANDER_COL_REGISTER == GPIOB)
# if (DIODE_DIRECTION == COL2ROW)
expander_status = i2c_write(0); if (expander_status) goto out;
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
uint8_t direction[2] = {
0,
expander_input_pin_mask,
};
# elif (DIODE_DIRECTION == ROW2COL)
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
expander_status = i2c_write(0); if (expander_status) goto out;
uint8_t direction[2] = {
expander_input_pin_mask,
0,
};
# endif
#endif
i2c_stop();
// set pull-up
// - unused : off : 0
// - input : on : 1
// - driving : off : 0
expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
expander_status = i2c_write(GPPUA); if (expander_status) goto out;
#if (EXPANDER_COL_REGISTER == GPIOA)
# if (DIODE_DIRECTION == COL2ROW)
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
expander_status = i2c_write(0); if (expander_status) goto out;
uint8_t pullup[2] = {
expander_input_pin_mask,
0,
};
# elif (DIODE_DIRECTION == ROW2COL)
expander_status = i2c_write(0); if (expander_status) goto out;
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
uint8_t pullup[2] = {
0,
expander_input_pin_mask,
};
# endif
#elif (EXPANDER_COL_REGISTER == GPIOB)
# if (DIODE_DIRECTION == COL2ROW)
expander_status = i2c_write(0); if (expander_status) goto out;
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
uint8_t pullup[2] = {
0,
expander_input_pin_mask,
};
# elif (DIODE_DIRECTION == ROW2COL)
expander_status = i2c_write(expander_input_pin_mask); if (expander_status) goto out;
expander_status = i2c_write(0); if (expander_status) goto out;
uint8_t pullup[2] = {
expander_input_pin_mask,
0,
};
# endif
#endif
out:
i2c_stop();
expander_status = i2c_writeReg(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
if (expander_status) return;
expander_status = i2c_writeReg(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
}
uint8_t matrix_scan(void)
@ -337,14 +349,11 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
// Read columns from expander, unless it's in an error state
if (! expander_status) {
expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
expander_status = i2c_write(EXPANDER_COL_REGISTER); if (expander_status) goto out;
expander_status = i2c_start(I2C_ADDR_READ); if (expander_status) goto out;
current_matrix[current_row] |= (~i2c_readNak()) & expander_input_pin_mask;
out:
i2c_stop();
uint8_t state = 0;
expander_status = i2c_readReg(I2C_ADDR, EXPANDER_COL_REGISTER, &state, 1, I2C_TIMEOUT);
if (! expander_status) {
current_matrix[current_row] |= (~state) & expander_input_pin_mask;
}
}
// Read columns from onboard pins
@ -366,11 +375,8 @@ static void select_row(uint8_t row) {
if (! expander_status) {
// set active row low : 0
// set other rows hi-Z : 1
expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
expander_status = i2c_write(EXPANDER_ROW_REGISTER); if (expander_status) goto out;
expander_status = i2c_write(0xFF & ~(1<<row)); if (expander_status) goto out;
out:
i2c_stop();
uint8_t port = 0xFF & ~(1<<row);
expander_status = i2c_writeReg(I2C_ADDR, EXPANDER_ROW_REGISTER, &port, 1, I2C_TIMEOUT);
}
// select on teensy
@ -426,13 +432,7 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
return false;
}
expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
expander_status = i2c_write(EXPANDER_ROW_REGISTER); if (expander_status) goto out;
expander_status = i2c_start(I2C_ADDR_READ); if (expander_status) goto out;
column_state = i2c_readNak();
out:
i2c_stop();
expander_status = i2c_readReg(I2C_ADDR, EXPANDER_ROW_REGISTER, &column_state, 1, I2C_TIMEOUT);
column_state = ~column_state;
} else {
@ -476,11 +476,8 @@ static void select_col(uint8_t col)
} else {
// set active col low : 0
// set other cols hi-Z : 1
expander_status = i2c_start(I2C_ADDR_WRITE); if (expander_status) goto out;
expander_status = i2c_write(EXPANDER_COL_REGISTER); if (expander_status) goto out;
expander_status = i2c_write(0xFF & ~(1<<col)); if (expander_status) goto out;
out:
i2c_stop();
uint8_t port = 0xFF & ~(1<<col);
expander_status = i2c_writeReg(I2C_ADDR, EXPANDER_COL_REGISTER, &port, 1, I2C_TIMEOUT);
}
} else {
// select on teensy