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Initialize the I2C bus of the EEPROM. Organize related macros neatly.

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This commit is contained in:
László Monda
2016-10-05 21:27:49 +02:00
parent f0b63a6f7b
commit 4830c98d50
2 changed files with 47 additions and 24 deletions
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43
right/src/i2c.h
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@@ -1,29 +1,36 @@
#ifndef __I2C_H__ #ifndef __I2C_H__
#define __I2C_H__ #define __I2C_H__
#define I2C_MAIN_BUS_SDA_PORT PORTD // Macros:
#define I2C_MAIN_BUS_SDA_CLOCK kCLOCK_PortD
#define I2C_MAIN_BUS_SDA_PIN 3
#define I2C_MAIN_BUS_SCL_PORT PORTD // Main bus
#define I2C_MAIN_BUS_SCL_CLOCK kCLOCK_PortD
#define I2C_MAIN_BUS_SCL_PIN 2
#define I2C_EEPROM_BUS_SDA_PORT PORTC #define I2C_MAIN_BUS_BASEADDR I2C0
#define I2C_EEPROM_BUS_SDA_CLOCK kCLOCK_PortC #define I2C_MASTER_BUS_CLK_SRC I2C0_CLK_SRC
#define I2C_EEPROM_BUS_SDA_PIN 11 #define I2C_MAIN_BUS_BAUD_RATE 100000 // 100 kHz works even with a 20 meter long bridge cable.
#define I2C_MAIN_BUS_MUX kPORT_MuxAlt7
#define I2C_EEPROM_BUS_SCL_PORT PORTC #define I2C_MAIN_BUS_SDA_PORT PORTD
#define I2C_EEPROM_BUS_SCL_CLOCK kCLOCK_PortD #define I2C_MAIN_BUS_SDA_CLOCK kCLOCK_PortD
#define I2C_EEPROM_BUS_SCL_PIN 10 #define I2C_MAIN_BUS_SDA_PIN 3
#define I2C_MAIN_BUS_BASEADDR I2C0 #define I2C_MAIN_BUS_SCL_PORT PORTD
#define I2C_EEPROM_BUS_BASEADDR I2C1 #define I2C_MAIN_BUS_SCL_CLOCK kCLOCK_PortD
#define I2C_MAIN_BUS_SCL_PIN 2
#define I2C_MAIN_BUS_BAUD_RATE 100000 // EEPROM bus
#define I2C_EEPROM_BUS_BAUD_RATE 1000000
#define I2C_MASTER_BUS_CLK_SRC I2C0_CLK_SRC #define I2C_EEPROM_BUS_BASEADDR I2C1
#define I2C_EEPROM_BUS_CLK_SRC I2C1_CLK_SRC #define I2C_EEPROM_BUS_CLK_SRC I2C1_CLK_SRC
#define I2C_EEPROM_BUS_BAUD_RATE 1000000 // 1 Mhz is the maximum speed of the EEPROM.
#define I2C_EEPROM_BUS_MUX kPORT_MuxAlt2
#define I2C_EEPROM_BUS_SDA_PORT PORTC
#define I2C_EEPROM_BUS_SDA_CLOCK kCLOCK_PortC
#define I2C_EEPROM_BUS_SDA_PIN 11
#define I2C_EEPROM_BUS_SCL_PORT PORTC
#define I2C_EEPROM_BUS_SCL_CLOCK kCLOCK_PortC
#define I2C_EEPROM_BUS_SCL_PIN 10
#endif #endif

28
right/src/init_peripherials.c
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@@ -8,22 +8,38 @@
void InitI2c() { void InitI2c() {
port_pin_config_t pinConfig = { port_pin_config_t pinConfig = {
.pullSelect = kPORT_PullUp, .pullSelect = kPORT_PullUp,
.openDrainEnable = kPORT_OpenDrainEnable, .openDrainEnable = kPORT_OpenDrainEnable
.mux = kPORT_MuxAlt7
}; };
i2c_master_config_t masterConfig;
I2C_MasterGetDefaultConfig(&masterConfig);
uint32_t sourceClock;
// Initialize main bus
CLOCK_EnableClock(I2C_MAIN_BUS_SDA_CLOCK); CLOCK_EnableClock(I2C_MAIN_BUS_SDA_CLOCK);
CLOCK_EnableClock(I2C_MAIN_BUS_SCL_CLOCK); CLOCK_EnableClock(I2C_MAIN_BUS_SCL_CLOCK);
pinConfig.mux = I2C_MAIN_BUS_MUX;
PORT_SetPinConfig(I2C_MAIN_BUS_SDA_PORT, I2C_MAIN_BUS_SDA_PIN, &pinConfig); PORT_SetPinConfig(I2C_MAIN_BUS_SDA_PORT, I2C_MAIN_BUS_SDA_PIN, &pinConfig);
PORT_SetPinConfig(I2C_MAIN_BUS_SCL_PORT, I2C_MAIN_BUS_SCL_PIN, &pinConfig); PORT_SetPinConfig(I2C_MAIN_BUS_SCL_PORT, I2C_MAIN_BUS_SCL_PIN, &pinConfig);
i2c_master_config_t masterConfig;
I2C_MasterGetDefaultConfig(&masterConfig);
masterConfig.baudRate_Bps = I2C_MAIN_BUS_BAUD_RATE; masterConfig.baudRate_Bps = I2C_MAIN_BUS_BAUD_RATE;
uint32_t sourceClock = CLOCK_GetFreq(I2C_MASTER_BUS_CLK_SRC); sourceClock = CLOCK_GetFreq(I2C_MASTER_BUS_CLK_SRC);
I2C_MasterInit(I2C_MAIN_BUS_BASEADDR, &masterConfig, sourceClock); I2C_MasterInit(I2C_MAIN_BUS_BASEADDR, &masterConfig, sourceClock);
// Initialize EEPROM bus
CLOCK_EnableClock(I2C_EEPROM_BUS_SDA_CLOCK);
CLOCK_EnableClock(I2C_EEPROM_BUS_SCL_CLOCK);
pinConfig.mux = I2C_EEPROM_BUS_MUX;
PORT_SetPinConfig(I2C_EEPROM_BUS_SDA_PORT, I2C_EEPROM_BUS_SDA_PIN, &pinConfig);
PORT_SetPinConfig(I2C_EEPROM_BUS_SCL_PORT, I2C_EEPROM_BUS_SCL_PIN, &pinConfig);
masterConfig.baudRate_Bps = I2C_EEPROM_BUS_BAUD_RATE;
sourceClock = CLOCK_GetFreq(I2C_EEPROM_BUS_CLK_SRC);
I2C_MasterInit(I2C_EEPROM_BUS_BASEADDR, &masterConfig, sourceClock);
} }
void InitPeripherials(void) void InitPeripherials(void)