From f34641e25bf5e6bea8581db488239333d2d927da Mon Sep 17 00:00:00 2001
From: Karl Palsson <karlp@tweak.net.au>
Date: Thu, 23 Mar 2017 23:58:20 +0000
Subject: i2c: use speed setting from newer library version

---
 tests/i2c-master/i2c-master.c | 95 -------------------------------------------
 1 file changed, 95 deletions(-)

(limited to 'tests/i2c-master/i2c-master.c')

diff --git a/tests/i2c-master/i2c-master.c b/tests/i2c-master/i2c-master.c
index bcaa1db..469e66f 100644
--- a/tests/i2c-master/i2c-master.c
+++ b/tests/i2c-master/i2c-master.c
@@ -27,101 +27,6 @@ enum sht21_cmd_e {
 
 // ------------------ section proposed to go up to libopencm3
 
-/**
- * I2C speed modes.
- */
-enum i2c_speeds {
-	i2c_speed_sm_100k,
-	i2c_speed_fm_400k,
-	i2c_speed_fmp_1m,
-	i2c_speed_unknown
-};
-
-/* to go to i2c-v1 impl file, with common name.... */
-/**
- * Set the i2c communicaton speed.
- * @param p i2c peripheral, eg I2C1
- * @param speed one of the listed speed modes @ref i2c_speeds
- * @param clock_megahz i2c peripheral clock speed in MHz. Usually, rcc_apb1_frequency / 1e6
- */
-static void i2c_set_speed_v1(uint32_t p, enum i2c_speeds speed, uint32_t clock_megahz)
-{
-	i2c_set_clock_frequency(p, clock_megahz);
-	switch(speed) {
-	case i2c_speed_fm_400k:
-		i2c_set_fast_mode(p);
-		i2c_set_ccr(p, clock_megahz * 5 / 6);
-		i2c_set_trise(p, clock_megahz + 1);
-		break;
-	default:
-		/* fall back to standard mode */
-	case i2c_speed_sm_100k:
-		i2c_set_standard_mode(p);
-		/* x Mhz / (100kHz * 2) */
-		i2c_set_ccr(p, clock_megahz * 5);
-		/* Sm mode, (100kHz) freqMhz + 1 */
-		i2c_set_trise(p, clock_megahz + 1);
-		break;
-	}
-}
-
-/* to go to i2c-v2 impl file, with common name.... */
-/**
- * Set the i2c communicaton speed.
- * NOTE: 1MHz mode not yet implemented!
- * Min clock speed: 8MHz for FM, 2Mhz for SM,
- * @param p i2c peripheral, eg I2C1
- * @param speed one of the listed speed modes @ref i2c_speeds
- * @param clock_megahz i2c peripheral clock speed in MHz. Usually, rcc_apb1_frequency / 1e6
- */
-static void i2c_set_speed_v2(uint32_t p, enum i2c_speeds speed, uint32_t clock_megahz)
-{
-	int prescaler;
-	switch(speed) {
-	case i2c_speed_fmp_1m:
-		/* FIXME - add support for this mode! */
-		break;
-	case i2c_speed_fm_400k:
-		/* target 8Mhz input, so tpresc = 125ns */
-		prescaler = clock_megahz / 8 - 1;
-		i2c_set_prescaler(p, prescaler);
-		i2c_set_scl_low_period(p, 0x9); // 1250ns
-		i2c_set_scl_high_period(p, 3); // 500ns
-		i2c_set_data_hold_time(p, 2); // 250ns
-		i2c_set_data_setup_time(p, 2); // 375ns
-		break;
-	default:
-		/* fall back to standard mode */
-	case i2c_speed_sm_100k:
-		/* target 2Mhz input, so tpresc = 500ns */
-		prescaler = clock_megahz / 4 - 1;
-		i2c_set_prescaler(p, prescaler);
-		i2c_set_scl_low_period(p, 0x13); // 5usecs
-		i2c_set_scl_high_period(p, 0xf); // 4usecs
-		i2c_set_data_hold_time(p, 2); // 0.5usecs
-		i2c_set_data_setup_time(p, 4); // 1.25usecs
-		break;
-	}
-}
-
-
-/* requires clock to be a multiple of 2 ! */
-/**
- * Set the i2c line speed as optimally as possible
- * @param p
- * @param speed
- * @param clock_megahz  _normally_ provide: rcc_apb1_frequency / 1000000 here
- * TODO: clock must be a multiple of 2meg for -v2 at least, improve docs here!
- */
-static void i2c_set_speed(uint32_t p, enum i2c_speeds speed, uint32_t clock_megahz)
-{
-#if defined I2C_SR2
-	i2c_set_speed_v1(p, speed, clock_megahz);
-#else
-	i2c_set_speed_v2(p, speed, clock_megahz);
-#endif
-}
-
 
 static void i2c_write7_v1(uint32_t i2c, int addr, uint8_t *data, size_t n)
 {
-- 
cgit