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Ld3320 is a special chip for speech recognition. The chip integrates speech recognition processor and some external circuits, including AD, DA converter, microphone interface, voice output interface and so on. This chip does not need any auxiliary chips such as FLASH, RAM, etc. it can be directly integrated into the existing products to realize the voice recognition / voice control / human-computer dialogue function. The key words list can be edited dynamically. The chip is used in induction cooker, microwave oven, smart home appliance operation, navigator, MP3, MP4, vending machine, public lighting system, health system and smart home voice control.
LibDriver LD3320 is the full function driver of LD3320 launched by LibDriver.It provides voice recognition, MP3 playback and other functions. LibDriver is MISRA compliant.
/src includes LibDriver LD3320 source files.
/interface includes LibDriver LD3320 SPI platform independent template.
/test includes LibDriver LD3320 driver test code and this code can test the chip necessary function simply.
/example includes LibDriver LD3320 sample code.
/doc includes LibDriver LD3320 offline document.
/datasheet includes LD3320 datasheet.
/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.
/misra includes the LibDriver MISRA code scanning results.
Reference /interface SPI platform independent template and finish your platform SPI driver.
Add the /src directory, the interface driver for your platform, and your own drivers to your project, if you want to use the default example drivers, add the /example directory to your project.
You can refer to the examples in the /example directory to complete your own driver. If you want to use the default programming examples, here's how to use them.
#include "driver_ld3320_asr.h"
uint8_t res;
uint32_t timeout;
uint8_t g_flag;
char text[50];
static void a_asr_callback(uint8_t type, uint8_t index, char *text)
{
uint8_t res;
if (type == LD3320_STATUS_ASR_FOUND_OK)
{
ld3320_interface_debug_print("ld3320: detect index %d %s.\n", index, text);
gs_flag = 1;
}
else if (type == LD3320_STATUS_ASR_FOUND_ZERO)
{
ld3320_interface_debug_print("ld3320: irq zero.\n");
(void)ld3320_asr_start();
}
else
{
ld3320_interface_debug_print("ld3320: irq unknow type.\n");
}
}
res = gpio_interrupt_init();
if (res != 0)
{
return 1;
}
res = ld3320_asr_init(a_asr_callback);
if (res != 0)
{
(void)gpio_interrupt_deinit();
return 1;
}
memset(text, 0, sizeof(char) * 50);
strcpy(text, "ni hao";
res = ld3320_asr_set_keys(text, 1);
if (res != 0)
{
(void)ld3320_asr_deinit();
(void)gpio_interrupt_deinit();
return 1;
}
gs_flag = 0;
res = ld3320_asr_start();
if (res != 0)
{
(void)ld3320_asr_deinit();
(void)gpio_interrupt_deinit();
return 1;
}
...
timeout = 1000 * 10;
while (timeout != 0)
{
if (gs_flag != 0)
{
break;
}
timeout--;
ld3320_interface_delay_ms(1);
}
if (timeout == 0)
{
ld3320_interface_debug_print("ld3320: wait timeout.\n");
(void)ld3320_asr_deinit();
(void)gpio_interrupt_deinit();
return 1;
}
...
ld3320_interface_debug_print("ld3320: found key word.\n");
(void)ld3320_asr_deinit();
(void)gpio_interrupt_deinit();
...
return 0;#include "driver_ld3320_mp3.h"
uint8_t res;
uint32_t timeout;
uint8_t g_flag;
static uint8_t a_mp3_callback(uint8_t type, uint8_t index, char *text)
{
if (type == LD3320_STATUS_MP3_LOAD)
{
ld3320_interface_debug_print("ld3320: irq mp3 load.\n");
}
else if (type == LD3320_STATUS_MP3_END)
{
gs_flag = 1;
ld3320_interface_debug_print("ld3320: irq mp3 end.\n");
}
else if (type == LD3320_STATUS_MP3_LOAD)
{
ld3320_interface_debug_print("ld3320: irq mp3 load.\n");
}
else
{
ld3320_interface_debug_print("ld3320: irq unknow type.\n");
}
}
res = gpio_interrupt_init();
if (res != 0)
{
return 1;
}
res = ld3320_mp3_init("xxx.mp3", a_mp3_callback);
if (res != 0)
{
(void)gpio_interrupt_deinit();
return 1;
}
gs_flag = 0;
res = ld3320_mp3_start();
if (res != 0)
{
(void)ld3320_mp3_deinit();
(void)gpio_interrupt_deinit();
return 1;
}
...
timeout = 1000 * 60 * 10;
while (timeout != 0)
{
if (gs_flag != 0)
{
break;
}
timeout--;
ld3320_interface_delay_ms(1);
}
if (timeout == 0)
{
ld3320_interface_debug_print("ld3320: wait timeout.\n");
(void)ld3320_mp3_deinit();
(void)gpio_interrupt_deinit();
return 1;
}
...
ld3320_interface_debug_print("ld3320: play end.\n");
(void)ld3320_mp3_deinit();
(void)gpio_interrupt_deinit();
...
return 0;Online documents: https://www.libdriver.com/docs/ld3320/index.html.
Offline documents: /doc/html/index.html.
Please refer to CONTRIBUTING.md.
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