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@ -23,9 +23,7 @@
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// adapted from I2C/master/master.c example
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// https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
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#if defined(TARGET_LPC1768)
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#ifdef TARGET_LPC1768
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#ifdef __cplusplus
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extern "C" {
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@ -40,8 +38,7 @@
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// These two routines are exact copies of the lpc17xx_i2c.c routines. Couldn't link to
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// to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
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static uint32_t _I2C_Start (LPC_I2C_TypeDef *I2Cx)
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{
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static uint32_t _I2C_Start (LPC_I2C_TypeDef *I2Cx) {
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// Reset STA, STO, SI
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I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC;
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@ -54,21 +51,15 @@
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return (I2Cx->I2STAT & I2C_STAT_CODE_BITMASK);
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}
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static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx)
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{
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static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) {
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/* Make sure start bit is not active */
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if (I2Cx->I2CONSET & I2C_I2CONSET_STA)
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{
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I2Cx->I2CONCLR = I2C_I2CONCLR_STAC;
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}
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I2Cx->I2CONSET = I2C_I2CONSET_STO|I2C_I2CONSET_AA;
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I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
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}
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//////////////////////////////////////////////////////////////////////////////////////
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#define U8G_I2C_OPT_FAST 16 // from u8g.h
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@ -89,13 +80,11 @@
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#error "Master I2C device not defined!"
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#endif
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PINSEL_CFG_Type PinCfg;
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I2C_M_SETUP_Type transferMCfg;
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#define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
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uint8_t u8g_i2c_start(uint8_t sla) { // send slave address and write bit
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// Sometimes TX data ACK or NAK status is returned. That mean the start state didn't
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// happen which means only the value of the slave address was send. Keep looping until
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@ -120,10 +109,9 @@
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return 1;
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}
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void u8g_i2c_init(uint8_t clock_option) {
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/*
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/**
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* Init I2C pin connect
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*/
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PinCfg.OpenDrain = 0;
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@ -155,7 +143,7 @@
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// Initialize I2C peripheral
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I2C_Init(I2CDEV_M, (clock_option & U8G_I2C_OPT_FAST) ? 400000: 100000); // LCD data rates
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/* Enable Master I2C operation */
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// Enable Master I2C operation
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I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
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u8g_i2c_start(0); // send slave address and write bit
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@ -180,4 +168,5 @@
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif // TARGET_LPC1768
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