From 048197ad519fd3bc1d05a15a7d4fb0a87270c635 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Sat, 17 Mar 2018 02:17:22 +0100
Subject: i2s start/stop fixed properly

---
 code/ecp/Makefile.fe310 |  8 ++++----
 code/fe310/eos/i2s.c    | 41 ++++++++++++++++++++++++++++++++---------
 code/fe310/eos/i2s.h    |  4 ++--
 3 files changed, 38 insertions(+), 15 deletions(-)

diff --git a/code/ecp/Makefile.fe310 b/code/ecp/Makefile.fe310
index 9070dd6..aae7793 100644
--- a/code/ecp/Makefile.fe310
+++ b/code/ecp/Makefile.fe310
@@ -4,10 +4,10 @@ htable=
 vconn=vconn
 rbuf_obj=
 
-FE310_HOME=/opt/my/freedom-e-sdk
+FE310_HOME = /opt/my/freedom-e-sdk
 
-CC=$(FE310_HOME)/work/build/riscv-gnu-toolchain/riscv64-unknown-elf/prefix/bin/riscv64-unknown-elf-gcc
-AR=$(FE310_HOME)/work/build/riscv-gnu-toolchain/riscv64-unknown-elf/prefix/bin/riscv64-unknown-elf-ar
+CC = $(FE310_HOME)/work/build/riscv-gnu-toolchain/riscv64-unknown-elf/prefix/bin/riscv64-unknown-elf-gcc
+AR = $(FE310_HOME)/work/build/riscv-gnu-toolchain/riscv64-unknown-elf/prefix/bin/riscv64-unknown-elf-ar
 
-CFLAGS_PL=-O3 -fno-builtin-printf -march=rv32imac -mabi=ilp32 -mcmodel=medany -I$(FE310_HOME)/bsp/include -I$(FE310_HOME)/bsp/drivers -I$(FE310_HOME)/bsp/env -I$(FE310_HOME)/bsp/env/freedom-e300-hifive1 -DECP_WITH_VCONN=1 -DECP_DEBUG=1
+CFLAGS_PL = -DECP_WITH_VCONN=1 -DECP_DEBUG=1 -O3 -fno-builtin-printf -march=rv32imac -mabi=ilp32 -mcmodel=medany -I$(FE310_HOME)/bsp/include -I$(FE310_HOME)/bsp/drivers -I$(FE310_HOME)/bsp/env -I$(FE310_HOME)/bsp/env/freedom-e300-hifive1
 # LDFLAGS_PL=-lm -pthread
\ No newline at end of file
diff --git a/code/fe310/eos/i2s.c b/code/fe310/eos/i2s.c
index 47be820..b771495 100644
--- a/code/fe310/eos/i2s.c
+++ b/code/fe310/eos/i2s.c
@@ -22,8 +22,8 @@ uint32_t _eos_i2s_mic_wm = 0;
 uint32_t _eos_i2s_spk_wm = 0;
 uint32_t _eos_i2s_mic_volume = 3;
 uint32_t _eos_i2s_spk_volume = 3;
-uint32_t _eos_i2s_mic_rd = 1;
-uint32_t _eos_i2s_spk_wr = 1;
+uint32_t _eos_i2s_mic_rd = 0;
+uint32_t _eos_i2s_spk_wr = 0;
 static eos_evt_fptr_t evt_handler[I2S_MAX_HANDLER];
 
 static void _abuf_init(EOSABuf *buf, uint8_t *array, uint16_t size) {
@@ -121,30 +121,44 @@ void eos_i2s_init(void) {
     I2S_PWM_REG_WS(PWM_CMP1)    = (_eos_i2s_ck_period + 1) * 32;
     I2S_PWM_REG_WS(PWM_CMP2)    = (_eos_i2s_ck_period + 1) * 62;
 
-    eos_intr_set(I2S_IRQ_SD_ID, I2S_IRQ_SD_PRIORITY, NULL);
-    eos_intr_set(I2S_IRQ_CK_ID, I2S_IRQ_CK_PRIORITY, NULL);
-    eos_intr_set(I2S_IRQ_WS_ID, I2S_IRQ_WS_PRIORITY, NULL);
-    eos_intr_set(I2S_IRQ_CI_ID, I2S_IRQ_CI_PRIORITY, NULL);
-
+    eos_intr_set(I2S_IRQ_SD_ID, 0, NULL);
+    eos_intr_set(I2S_IRQ_CK_ID, 0, NULL);
+    eos_intr_set(I2S_IRQ_WS_ID, 0, NULL);
+    eos_intr_set(I2S_IRQ_CI_ID, 0, NULL);
     for (i=0; i<I2S_MAX_HANDLER; i++) {
         evt_handler[i] = eos_evtq_bad_handler;
     }
     eos_evtq_set_handler(EOS_EVT_AUDIO, audio_handler, EOS_EVT_FLAG_WRAP);
 }
 
-void eos_i2s_init_mic(uint8_t *mic_arr, uint16_t mic_arr_size, uint16_t mic_wm, eos_evt_fptr_t mic_wm_handler) {
+void eos_i2s_init_mic(uint8_t *mic_arr, uint16_t mic_arr_size, eos_evt_fptr_t mic_wm_handler, uint16_t mic_wm) {
     _abuf_init(&_eos_i2s_mic_buf, mic_arr, mic_arr_size);
     _eos_i2s_mic_wm = mic_wm;
     evt_handler[I2S_EVT_MIC] = mic_wm_handler;
+    if (mic_wm) {
+        _eos_i2s_mic_rd = 1;
+    } else {
+        _eos_i2s_mic_rd = 0;
+    }
 }
 
-void eos_i2s_init_spk(uint8_t *spk_arr, uint16_t spk_arr_size, uint16_t spk_wm, eos_evt_fptr_t spk_wm_handler) {
+void eos_i2s_init_spk(uint8_t *spk_arr, uint16_t spk_arr_size, eos_evt_fptr_t spk_wm_handler, uint16_t spk_wm) {
     _abuf_init(&_eos_i2s_spk_buf, spk_arr, spk_arr_size);
     _eos_i2s_spk_wm = spk_wm;
     evt_handler[I2S_EVT_SPK] = spk_wm_handler;
+    if (spk_wm) {
+        _eos_i2s_spk_wr = 1;
+    } else {
+        _eos_i2s_spk_wr = 0;
+    }
 }
 
 void eos_i2s_start(void) {
+    eos_intr_set_priority(I2S_IRQ_SD_ID, I2S_IRQ_SD_PRIORITY);
+    eos_intr_set_priority(I2S_IRQ_CK_ID, I2S_IRQ_CK_PRIORITY);
+    eos_intr_set_priority(I2S_IRQ_WS_ID, I2S_IRQ_WS_PRIORITY);
+    eos_intr_set_priority(I2S_IRQ_CI_ID, I2S_IRQ_CI_PRIORITY);
+
     I2S_PWM_REG_CK(PWM_COUNT)   = 0;
     I2S_PWM_REG_WS(PWM_COUNT)   = 0;
 
@@ -164,6 +178,14 @@ void eos_i2s_stop(void) {
     I2S_PWM_REG_CK(PWM_COUNT)   = 0;
     I2S_PWM_REG_WS(PWM_COUNT)   = 0;
 
+    eos_intr_set_priority(I2S_IRQ_SD_ID, 0);
+    eos_intr_set_priority(I2S_IRQ_CK_ID, 0);
+    eos_intr_set_priority(I2S_IRQ_WS_ID, 0);
+    eos_intr_set_priority(I2S_IRQ_CI_ID, 0);
+    eos_intr_mask(0);
+    eos_i2s_init_mic(NULL, 0, NULL, 0);
+    eos_i2s_init_spk(NULL, 0, NULL, 0);
+
     GPIO_REG(GPIO_IOF_EN)       &= ~(1 << I2S_PIN_CK);
     GPIO_REG(GPIO_IOF_SEL)      &= ~(1 << I2S_PIN_CK);
     
@@ -174,6 +196,7 @@ void eos_i2s_stop(void) {
 }
 
 uint16_t eos_i2s_mic_len(void) {
+    clear_csr(mstatus, MSTATUS_MIE);
     uint16_t ret = _abuf_len(&_eos_i2s_mic_buf);
     set_csr(mstatus, MSTATUS_MIE);
     return ret;
diff --git a/code/fe310/eos/i2s.h b/code/fe310/eos/i2s.h
index 29e7a28..6833948 100644
--- a/code/fe310/eos/i2s.h
+++ b/code/fe310/eos/i2s.h
@@ -8,8 +8,8 @@ typedef struct EOSABuf {
 } EOSABuf;
 
 void eos_i2s_init(void);
-void eos_i2s_init_mic(uint8_t *mic_arr, uint16_t mic_arr_size, uint16_t mic_wm, eos_evt_fptr_t mic_wm_handler);
-void eos_i2s_init_spk(uint8_t *spk_arr, uint16_t spk_arr_size, uint16_t spk_wm, eos_evt_fptr_t spk_wm_handler);
+void eos_i2s_init_mic(uint8_t *mic_arr, uint16_t mic_arr_size, eos_evt_fptr_t mic_wm_handler, uint16_t mic_wm);
+void eos_i2s_init_spk(uint8_t *spk_arr, uint16_t spk_arr_size, eos_evt_fptr_t spk_wm_handler, uint16_t spk_wm);
 void eos_i2s_start(void);
 void eos_i2s_stop(void);
 uint16_t eos_i2s_mic_len(void);
-- 
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