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stm32: fix i2c and add stm32f407 i2c

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This commit is contained in:
Kenneth Bell
2021-02-21 22:38:33 -08:00
committed by Ron Evans
parent 24976a6974
commit 66f76833ad
4 changed files with 99 additions and 15 deletions
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src/machine/machine_stm32_i2c.go
+8 -14
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@@ -1,4 +1,4 @@
// +build stm32,!stm32f103,!stm32f407,!stm32f7x2,!stm32l5x2,!stm32l0
// +build stm32,!stm32f103,!stm32f7x2,!stm32l5x2,!stm32l0
package machine
@@ -151,7 +151,7 @@ func (i2c I2C) Configure(config I2CConfig) error {
i2c.Bus.CR1.ClearBits(stm32.I2C_CR1_ENGC | stm32.I2C_CR1_NOSTRETCH)
// enable I2C interface
i2c.Bus.CR1.ClearBits(stm32.I2C_CR1_PE)
i2c.Bus.CR1.SetBits(stm32.I2C_CR1_PE)
return nil
}
@@ -161,9 +161,13 @@ func (i2c I2C) Tx(addr uint16, w, r []byte) error {
if err := i2c.controllerTransmit(addr, w); nil != err {
return err
}
if err := i2c.controllerReceive(addr, r); nil != err {
return err
if len(r) > 0 {
if err := i2c.controllerReceive(addr, r); nil != err {
return err
}
}
return nil
}
@@ -173,11 +177,6 @@ func (i2c I2C) controllerTransmit(addr uint16, w []byte) error {
return errI2CBusReadyTimeout
}
// ensure peripheral is enabled
if !i2c.Bus.CR1.HasBits(stm32.I2C_CR1_PE) {
i2c.Bus.CR1.SetBits(stm32.I2C_CR1_PE)
}
// disable POS
i2c.Bus.CR1.ClearBits(stm32.I2C_CR1_POS)
@@ -256,11 +255,6 @@ func (i2c I2C) controllerReceive(addr uint16, r []byte) error {
return errI2CBusReadyTimeout
}
// ensure peripheral is enabled
if !i2c.Bus.CR1.HasBits(stm32.I2C_CR1_PE) {
i2c.Bus.CR1.SetBits(stm32.I2C_CR1_PE)
}
// disable POS
i2c.Bus.CR1.ClearBits(stm32.I2C_CR1_POS)