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@ -77,7 +77,7 @@ uint8_t init_mcp23017(void) { |
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// This means: we will write to the pins 0-4 on GPIOB (in select_rows) |
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// This means: we will write to the pins 0-4 on GPIOB (in select_rows) |
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uint8_t buf[] = {0b11111111, 0b11110000}; |
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uint8_t buf[] = {0b11111111, 0b11110000}; |
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print("before transmit\n"); |
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print("before transmit\n"); |
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mcp23017_status = i2c_writeReg(I2C_ADDR, IODIRA, buf, sizeof(buf), MCP23017_I2C_TIMEOUT) |
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mcp23017_status = i2c_write_register(I2C_ADDR, IODIRA, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); |
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uprintf("after transmit %i\n", mcp23017_status); |
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uprintf("after transmit %i\n", mcp23017_status); |
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if (!mcp23017_status) { |
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if (!mcp23017_status) { |
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// set pull-up |
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// set pull-up |
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@ -86,7 +86,7 @@ uint8_t init_mcp23017(void) { |
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// - driving : off : 0 |
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// - driving : off : 0 |
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// This means: we will read all the bits on GPIOA |
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// This means: we will read all the bits on GPIOA |
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// This means: we will write to the pins 0-4 on GPIOB (in select_rows) |
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// This means: we will write to the pins 0-4 on GPIOB (in select_rows) |
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mcp23017_status = i2c_writeReg(I2C_ADDR, GPPUA, buf, sizeof(buf), MCP23017_I2C_TIMEOUT) |
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mcp23017_status = i2c_write_register(I2C_ADDR, GPPUA, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); |
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uprintf("after transmit2 %i\n", mcp23017_status); |
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uprintf("after transmit2 %i\n", mcp23017_status); |
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} |
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} |
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return mcp23017_status; |
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return mcp23017_status; |
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@ -191,7 +191,7 @@ static matrix_row_t read_cols(uint8_t row) { |
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// 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. |
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// 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. |
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// 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. |
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// 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. |
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uint8_t data[] = {0}; |
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uint8_t data[] = {0}; |
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mcp23017_status = i2c_readReg(I2C_ADDR, MCP23017_GPIOA, data, sizeof(data), MCP23017_I2C_TIMEOUT); |
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mcp23017_status = i2c_read_register(I2C_ADDR, MCP23017_GPIOA, data, sizeof(data), MCP23017_I2C_TIMEOUT); |
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return ~data[0]; |
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return ~data[0]; |
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} |
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} |
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} |
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} |
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@ -237,7 +237,7 @@ static void select_row(uint8_t row) { |
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// 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. |
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// 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. |
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// 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. |
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// 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. |
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uint8_t buf[] = {0xFF & ~(1 << (row - MATRIX_ROWS_PER_SIDE))}; |
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uint8_t buf[] = {0xFF & ~(1 << (row - MATRIX_ROWS_PER_SIDE))}; |
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mcp23017_status = i2c_writeReg(I2C_ADDR, MCP23017_GPIOB, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); |
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mcp23017_status = i2c_write_register(I2C_ADDR, MCP23017_GPIOB, buf, sizeof(buf), MCP23017_I2C_TIMEOUT); |
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} |
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} |
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} |
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} |
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} |
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} |