diff options
Diffstat (limited to 'drivers/gdisp/SSD1306/gdisp_lld_board_example_i2c.h')
| -rw-r--r-- | drivers/gdisp/SSD1306/gdisp_lld_board_example_i2c.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/gdisp/SSD1306/gdisp_lld_board_example_i2c.h b/drivers/gdisp/SSD1306/gdisp_lld_board_example_i2c.h new file mode 100644 index 00000000..0e7e153a --- /dev/null +++ b/drivers/gdisp/SSD1306/gdisp_lld_board_example_i2c.h @@ -0,0 +1,137 @@ +/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ * http://ugfx.org/license.html
+ */
+
+#ifndef _GDISP_LLD_BOARD_H
+#define _GDISP_LLD_BOARD_H
+
+#define SSD1306_RESET_PORT GPIOB
+#define SSD1306_RESET_PIN 5
+
+/**
+ * The default slave address is 0x3D, (talking about
+ * only the real address part here) and the slave
+ * address can be changed to 0x3C by soldering the
+ * SA0 pads on the bottom side of the module.
+ *
+ * b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0
+ * --------------------------------------
+ * 0 | 1 | 1 | 1 | 1 | 0 |SA0 | R/W
+ */
+#define SSD1306_I2C_ADDRESS 0x3D
+#define SSD1306_SDA_PORT GPIOB
+#define SSD1306_SDA_PIN 7
+#define SSD1306_SCL_PORT GPIOB
+#define SSD1306_SCL_PIN 6
+#define SET_RST palSetPad(SSD1306_RESET_PORT, SSD1306_RESET_PIN);
+#define CLR_RST palClearPad(SSD1306_RESET_PORT, SSD1306_RESET_PIN);
+int8_t vccstate;
+int32_t row_offset = 0;
+
+// I2C configuration structure.
+static I2CConfig i2cconfig;
+
+
+/**
+ * @brief Initialize the board for the display.
+ * @notes This board definition uses GPIO and assumes exclusive access to these GPIO pins
+ * @notapi
+ */
+static inline void init_board(void) {
+
+ // RESET pin.
+ palSetPadMode(SSD1306_RESET_PORT, SSD1306_RESET_PIN, PAL_MODE_OUTPUT_PUSHPULL);
+
+
+ /*
+ * Initializes the I2C driver 1. The I2C1 signals are routed as follows:
+ * PB6 - SCL.
+ * PB7 - SDA.
+ * Timing value comes from ST I2C config tool (xls):
+ * 0x00901D2B; // 100kHz Standard Mode
+ * 0x00300444; // 100kHz Fast Mode
+ * 0x0030020A; // 400kHz Fast Mode
+ * 0x00100002; // 800kHz Fast Mode +
+ */
+ i2cconfig.timingr = 0x00100002; // 800kHz Fast Mode+
+ i2cInit();
+ palSetPadMode(SSD1306_SCL_PORT, SSD1306_SCL_PIN, PAL_MODE_ALTERNATE(1));
+ palSetPadMode(SSD1306_SDA_PORT, SSD1306_SDA_PIN, PAL_MODE_ALTERNATE(1));
+ vccstate = SSD1306_SWITCHCAPVCC;
+}
+
+/**
+ * @brief Set or clear the lcd reset pin.
+ * @param[in] state TRUE = lcd in reset, FALSE = normal operation
+ * @notapi
+ */
+static inline void setpin_reset(bool_t state) {
+ if(state)
+ SET_RST
+ else
+ CLR_RST
+}
+
+/**
+ * @brief Set the lcd back-light level.
+ * @param[in] percent 0 to 100%
+ * @notapi
+ */
+static inline void set_backlight(uint8_t percent) {
+ // Since we are on OLED no backlight needed
+}
+
+/**
+ * @brief Take exclusive control of the bus
+ * @notapi
+ */
+static inline void acquire_bus(void) {
+ i2cAcquireBus(&I2CD1);
+}
+
+/**
+ * @brief Release exclusive control of the bus
+ * @notapi
+ */
+static inline void release_bus(void) {
+ i2cReleaseBus(&I2CD1);
+}
+
+/**
+ * @brief Send command to the display.
+ * @param[in] cmd The command to send *
+ * @notapi
+ */
+static inline void write_cmd(uint8_t cmd) {
+ uint8_t command[] = { 0x00, // Co = 0, D/C = 0
+ cmd },
+ txLength = sizeof(command)/sizeof(command[0]),
+ rxLength = 0;
+ i2cStart(&I2CD1, &i2cconfig);
+ i2cMasterTransmitTimeout(&I2CD1, SSD1306_I2C_ADDRESS, command, txLength, NULL, rxLength, MS2ST(10));
+ i2cStop(&I2CD1);
+}
+
+/**
+ * @brief Send data to the display.
+ * @param[in] data The data to send
+ * @notapi
+ */
+static inline void write_data(uint8_t* data, uint16_t length) {
+ uint8_t command[length+1],
+ txLength = length+1,
+ rxLength = 0;
+ command[0] = 0x40; // Co = 0, D/C = 1
+ memmove(&command[1], data, length);
+
+ i2cStart(&I2CD1, &i2cconfig);
+ i2cMasterTransmitTimeout(&I2CD1, SSD1306_I2C_ADDRESS, command, txLength, NULL, rxLength, MS2ST(10));
+ i2cStop(&I2CD1);
+}
+
+#endif /* _GDISP_LLD_BOARD_H */
+/** @} */
+
|