alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-09-07 08:06:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

lp-i2c: Added support for LP I2C peripheral to LP core

Browse Source 
This commit adds support for the LP I2C peripheral driver to be used by
the LP core. An example is also added to demonstrate the usage of the LP
I2C peripheral from the LP core.
This commit is contained in:
Sudeep Mohanty
2023-03-20 16:08:38 +01:00
parent 224430f6b4
commit ec742abb25
27 changed files with 1246 additions and 198 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
components/hal/esp32c6/include/hal/i2c_ll.h
View File

@@ -17,6 +17,7 @@
#include "soc/pcr_struct.h"
#include "hal/i2c_types.h"
#include "soc/clk_tree_defs.h"
#include "soc/lp_clkrst_struct.h"
#ifdef __cplusplus
extern "C" {
@@ -62,7 +63,7 @@ typedef enum {
} i2c_ll_slave_intr_t;
// Get the I2C hardware instance
#define I2C_LL_GET_HW(i2c_num) (&I2C0)
#define I2C_LL_GET_HW(i2c_num) (((i2c_num) == I2C_NUM_0) ? (&I2C0) : (&LP_I2C))
#define I2C_LL_MASTER_EVENT_INTR (I2C_NACK_INT_ENA_M|I2C_TIME_OUT_INT_ENA_M|I2C_TRANS_COMPLETE_INT_ENA_M|I2C_ARBITRATION_LOST_INT_ENA_M|I2C_END_DETECT_INT_ENA_M)
#define I2C_LL_SLAVE_EVENT_INTR (I2C_RXFIFO_WM_INT_ENA_M|I2C_TRANS_COMPLETE_INT_ENA_M|I2C_TXFIFO_WM_INT_ENA_M)
@@ -665,11 +666,42 @@ static inline void i2c_ll_master_clr_bus(i2c_dev_t *hw)
*/
static inline void i2c_ll_set_source_clk(i2c_dev_t *hw, i2c_clock_source_t src_clk)
{
(void)hw;
if (hw == &LP_I2C) {
// Do nothing
return;
}
// src_clk : (1) for RTC_CLK, (0) for XTAL
PCR.i2c_sclk_conf.i2c_sclk_sel = (src_clk == I2C_CLK_SRC_RC_FAST) ? 1 : 0;
}
#if SOC_LP_I2C_SUPPORTED
/**
* @brief Set LP I2C source clock
*
* @param hw Address offset of the LP I2C peripheral registers
* @param src_clk Source clock for the LP I2C peripheral
*
* @return None
*/
static inline void lp_i2c_ll_set_source_clk(i2c_dev_t *hw, soc_periph_lp_i2c_clk_src_t src_clk)
{
(void)hw;
// src_clk : (0) for LP_FAST_CLK (RTC Fast), (1) for XTAL_D2_CLK
switch (src_clk) {
case LP_I2C_SCLK_LP_FAST:
LP_CLKRST.lpperi.lp_i2c_clk_sel = 0;
break;
case LP_I2C_SCLK_XTAL_D2:
LP_CLKRST.lpperi.lp_i2c_clk_sel = 1;
break;
default:
// Invalid source clock selected
abort();
}
}
#endif /* SOC_LP_I2C_SUPPORTED */
/**
* @brief Enable I2C peripheral controller clock
*
@@ -678,7 +710,11 @@ static inline void i2c_ll_set_source_clk(i2c_dev_t *hw, i2c_clock_source_t src_c
*/
static inline void i2c_ll_enable_controller_clock(i2c_dev_t *hw, bool en)
{
(void)hw;
if (hw == &LP_I2C) {
// Do nothing
return;
}
PCR.i2c_sclk_conf.i2c_sclk_en = en;
}