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authorUwe Hermann2010-12-30 02:12:31 +0100
committerUwe Hermann2010-12-30 02:12:31 +0100
commit8e084b1517088036e3db9bbd255b1c231cd2a108 (patch)
tree3951e9861d36a8007e71a41d432329ca63cd81bf /lib/stm32/i2c.c
parentbcce98da54b047a15ef0abf41e0c7794f29f0439 (diff)
Move STM32-specific source to lib/stm32 subdir.
Diffstat (limited to 'lib/stm32/i2c.c')
-rw-r--r--lib/stm32/i2c.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/lib/stm32/i2c.c b/lib/stm32/i2c.c
new file mode 100644
index 0000000..e161b7f
--- /dev/null
+++ b/lib/stm32/i2c.c
@@ -0,0 +1,93 @@
+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopenstm32/i2c.h>
+
+void i2c_peripheral_enable(u32 i2c)
+{
+ I2C_CR1(i2c) |= I2C_CR1_PE;
+}
+
+void i2c_peripheral_disable(u32 i2c)
+{
+ I2C_CR1(i2c) &= ~I2C_CR1_PE;
+}
+
+void i2c_send_start(u32 i2c)
+{
+ I2C_CR1(i2c) |= I2C_CR1_START;
+}
+
+void i2c_send_stop(u32 i2c)
+{
+ I2C_CR1(i2c) |= I2C_CR1_STOP;
+}
+
+void i2c_set_own_7bit_slave_address(u32 i2c, u8 slave)
+{
+ I2C_OAR1(i2c) = (u16)(slave << 1);
+ I2C_OAR1(i2c) &= ~I2C_OAR1_ADDMODE;
+ I2C_OAR1(i2c) |= (1 << 14); /* Datasheet: always keep 1 by software. */
+}
+
+void i2c_set_own_10bit_slave_address(u32 i2c, u16 slave)
+{
+ I2C_OAR1(i2c) = (u16)(I2C_OAR1_ADDMODE | slave);
+}
+
+void i2c_set_fast_mode(u32 i2c)
+{
+ I2C_CCR(i2c) |= I2C_CCR_FS;
+}
+
+void i2c_set_standard_mode(u32 i2c)
+{
+ I2C_CCR(i2c) &= ~I2C_CCR_FS;
+}
+
+void i2c_set_clock_frequency(u32 i2c, u8 freq)
+{
+ u16 reg16;
+ reg16 = I2C_CR2(i2c) & 0xffc0; /* Clear bits [5:0]. */
+ reg16 |= freq;
+ I2C_CR2(i2c) = reg16;
+}
+
+void i2c_set_ccr(u32 i2c, u16 freq)
+{
+ u16 reg16;
+ reg16 = I2C_CCR(i2c) & 0xf000; /* Clear bits [11:0]. */
+ reg16 |= freq;
+ I2C_CCR(i2c) = reg16;
+}
+
+void i2c_set_trise(u32 i2c, u16 trise)
+{
+ I2C_TRISE(i2c) = trise;
+}
+
+void i2c_send_7bit_address(u32 i2c, u8 slave, u8 readwrite)
+{
+ I2C_DR(i2c) = (u8)((slave << 1) | readwrite);
+}
+
+void i2c_send_data(u32 i2c, u8 data)
+{
+ I2C_DR(i2c) = data;
+}