36 lines
808 B
C
Executable File
36 lines
808 B
C
Executable File
#include "sx60.h"
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#include "i2c_master.h"
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bool i2c_initialized = 0;
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uint8_t mcp23018_status = 0x20;
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uint8_t init_mcp23018(void) {
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mcp23018_status = 0x20;
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/* I2C subsystem */
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if (i2c_initialized == 0) {
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i2c_init(); // on pins D(1,0)
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i2c_initialized = true;
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_delay_ms(1000);
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}
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/* B Pins are Row, A pins are Columns
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Set them to output */
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static uint8_t direction[2] = {
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0b11111111,
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0b00000000,
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};
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static uint8_t pullup[2] = {
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0b11111111,
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0b00000000,
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};
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mcp23018_status = i2c_write_register(I2C_ADDR, IODIRA, direction, 2, I2C_TIMEOUT);
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if (mcp23018_status) return mcp23018_status;
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mcp23018_status = i2c_write_register(I2C_ADDR, GPPUA, pullup, 2, I2C_TIMEOUT);
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return mcp23018_status;
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}
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