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分享DM9051 SPI 接口以太网模块 + Nuvoton NuTinyM051 + uIP 实现 web server
最近在某個论坛裡，看到这篇STM32F103+DM9051_UIP_SPI to 以太网，透过該版主拿到了DM9051NP 以太网卡，刚好手上有Nuvoton NuTiny M051 和 M451,就先用M051拿来做一个简单的web server,透过web serve' 来控制开发板上的LED灯亮灭。
1. DM9051NP硬体相关描述
DM9051NP SPI接口以太网模块是聯傑國際(DAVICOM)为了方便嵌入式ARM、MCU单片机系统进行以太网通信而开发出的解决方案。DM9051NP晶片是带有行业标准串列外设介面（Serial Peripheral Interface，SPI）的独立以太网控制器。DM9051NP符合IEEE 802.3 规范，它还支援以DMA 模式來传输，以实现资料传送快速。DM9051NP通过1个中断引脚和SPI介面來进行与主控制器MCU单片机的通信，资料传输规格为10/100 M。相關介紹可以參考STM32F103+DM9051_UIP_SPI to 以太网。以下是DM9051NP 以太網卡特點：
• Package:32支接脚封装,QFN.
• IEEE 802.3az Energy Efficient Ethernet (EEE)
• Built-in integrated 3.3V to 1.8V regulator
• 远端唤醒 (WOL)
• 平行线/交叉线自动切换 HP Auto-MDIX
• Support 光口介面
• 具有16KB SRAM静态随机存取记忆
• EMI (Class B) and HBM ESD Rating 8KV
• 工业温度规范: –40度 to +85度
• 功率：（100/10 M） => 429/561 mW
• 连续工作温度<60度
上图是聯傑國際(DAVICOM) DM9051NP 以太网路卡SPI Pin的排列。
NuTinyM051使用的是SPI1与DM9051NP SPI脚位的硬体连接如下:
M0516 DM9051
P0.7(Pin32) CLK (Pin07)
P0.6(Pin33) MISO (Pin05)
P0.5(Pin34) MOSI (Pin03)
P0.4(Pin35) CSS (Pin01)
上图为M051 + DM9051硬体连接示意图。
2.DM9051网卡驱动
SPI 设定和 R/W data 参考M0516 Library SPI_Loopback sample code 可到nuvoton 官网下载M0516 Library, 再参考STM32F103+DM9051_UIP_SPI to 以太网附件中的驱动，将DM9051_Configuration() SPI设定改为M0516 SPI1 Pin Group 设定和修改DM9051_Read_Reg(), DM9051_Write_Reg(), DM9051_Read_Mem(), DM9051_Writer_Mem() , 修改如下：
(1) 首先配置M0516 SPI1 相关设定
void DM9051_Configuration(void)
{
/* Enable SPI1 peripheral clock */
CLK_EnableModuleClock(SPI1_MODULE);
/* Select HCLK as the clock source of SPI1 */
CLK_SetModuleClock(SPI1_MODULE, CLK_CLKSEL1_SPI1_S_HCLK, MODULE_NoMsk);
/* Reset IP */
SYS_ResetModule(SPI1_RST);
/* Setup SPI1 multi-function pins */
SYS->P0_MFP = SYS_MFP_P04_SPISS1 | SYS_MFP_P05_MOSI_1 | SYS_MFP_P06_MISO_1 | SYS_MFP_P07_SPICLK1;
/*---------------------------------------------------------------------------------------------------------*/
/* Init SPI */
/*---------------------------------------------------------------------------------------------------------*/
/* Configure SPI1 as a master, SPI clock rate 25MHz,
clock idle low, 32-bit transaction, drive output on falling clock edge and latch input on rising edge. */
SPI_Open(SPI1, SPI_MASTER, SPI_MODE_0, 8, 25000000);
/* Disable the automatic hardware slave selection function. Select the SPI1_SS pin and configure as low-active. */
SPI_DisableAutoSS(SPI1);
SPI_EnableFIFO(SPI1, 3, 3);
}(2) 透过read cmd 读出register
/*------------------------------------------------------*/
/* DM9051_Read_Reg() */
/* SPI read command: bit7 = 0, */
/* bit[6:0] = Reg. offset addr */
/* Disable auto SPI slave chip select. */
/*------------------------------------------------------*/
uint8_t DM9051_Read_Reg(uint8_t Reg_Off)
{
SPI_SET_SS_LOW(SPI1);
/* SPI transfer DM9051 Read-Command and Reg. offset. */
//SPI_WRITE_TX0(SPI1, (uint32_t)Reg_Off); //Read command + Register offset address
while(SPI_GET_TX_FIFO_FULL_FLAG(SPI1));
SPI_WRITE_TX0(SPI1, Reg_Off); //Read command + Register offset address
while(SPI_IS_BUSY(SPI1));
SPI_WRITE_TX0(SPI1, 0x0); //Dummy for read register value.
while(SPI_IS_BUSY(SPI1));
SPI_READ_RX0(SPI1); // dummy read, jump 1st byte.
SPI_SET_SS_HIGH(SPI1);
return (SPI_READ_RX0(SPI1) & 0xFF);
}(3)透过write cmd 写入register
/*------------------------------------------------------*/
/* DM9051_Write_Reg() */
/* SPI write command: bit7 = 1, */
/* bit[6:0] = Reg. offset addr */
/* Disable auto SPI slave chip select. */
/*------------------------------------------------------*/
void DM9051_Write_Reg(uint8_t Reg_Off, uint8_t spi_data)
{
uint32_t cmdaddr;
cmdaddr = (Reg_Off | 0x80);
SPI_SET_SS_LOW(SPI1);
/* SPI transfer DM9051 Read-Command and Reg. offset. */
SPI_WRITE_TX0(SPI1, cmdaddr); //Read command + Register offset address
while(SPI_IS_BUSY(SPI1));
SPI_WRITE_TX0(SPI1, (uint32_t)spi_data);
while(SPI_IS_BUSY(SPI1));
/*Clear SPI TX FIFO*/
SPI_ClearRxFIFO(SPI1);
SPI_SET_SS_HIGH(SPI1);
return;
}(4) 连续读出 data 从spi array
/*------------------------------------------------------*/
/* DM9051_Read_Mem() */
/* */
/* DM9051 burst read command: SPI_RD_BURST = 0x72 */
/* Disable auto SPI slave chip select. */
/*------------------------------------------------------*/
void DM9051_Read_Mem(uint8_t* pu8data, uint32_t datalen)
{
uint32_t i;
// Read SPI_Data_Array back from the slave
uint8_t burstcmd = SPI_RD_BURST;
SPI_SET_SS_LOW(SPI1);
SPI_WRITE_TX0(SPI1, (uint32_t)burstcmd);
while(SPI_IS_BUSY(SPI1));
SPI_READ_RX0(SPI1);
for(i = 0 ; i < datalen; i++){
pu8data[i] = SPI_WRITE_TX0(SPI1, (uint32_t )0x0);
while(SPI_GET_RX_FIFO_EMPTY_FLAG(SPI1));
pu8data[i] = (uint8_t)SPI_READ_RX0(SPI1);
}
while(SPI_IS_BUSY(SPI1));
/*Clear SPI TX FIFO*/
SPI_ClearTxFIFO(SPI1);
SPI_SET_SS_HIGH(SPI1);
}(5) 连续写入data到spi array
/*------------------------------------------------------*/
/* DM9051_Write_Mem() */
/* */
/* DM9051 burst write command: SPI_WR_BURST = 0xF8 */
/* Disable auto SPI slave chip select. */
/*------------------------------------------------------*/
void DM9051_Write_Mem(uint8_t* pu8data, uint32_t datalen)
{
uint32_t i;
uint8_t burstcmd = SPI_WR_BURST; /* Send the array to the slave*/
SPI_SET_SS_LOW(SPI1);
SPI_WRITE_TX0(SPI1, (uint32_t)burstcmd);
while(SPI_IS_BUSY(SPI1));
SPI_READ_RX0(SPI1);
for(i = 0; i < datalen; i++){
while(SPI_GET_TX_FIFO_FULL_FLAG(SPI1));
SPI_WRITE_TX0(SPI1, (uint32_t)pu8data[i]);
}
while(SPI_IS_BUSY(SPI1));
/*Clear SPI RX FIFO*/
SPI_ClearRxFIFO(SPI1);
SPI_SET_SS_HIGH(SPI1);
}3. 简单的web server 控制 LED
uIP就不多介绍了，网路上有许多相关资料可以参考,在上一部份将驱动设置好后,將tapdev_init()、tapdev_read()、tapdev_send()對應到DM9051_init()、DM9051_rx()、DM9051_tx() function即可附件可參考,在main()中加入在 http_init(); 然后在http.c 在handle_input中天加 控制 LED function，新增web_led.c 和web_led.h 如下:
(1)首先先在 http.c handle_input()新增判斷:
static PT_THREAD(handle_input(struct httpd_state *s))
{
PSOCK_BEGIN(&s->sin);
PSOCK_READTO(&s->sin, ISO_space);
if(strncmp(s->inputbuf, http_get, 4) != 0) {
PSOCK_CLOSE_EXIT(&s->sin);
}
PSOCK_READTO(&s->sin, ISO_space);
if(s->inputbuf[0] != ISO_slash) {
PSOCK_CLOSE_EXIT(&s->sin);
}
if(s->inputbuf[1] == ISO_space) {
//strncpy(s->filename, http_index_html, sizeof(s->filename));
strncpy(s->filename, http_webMain_html, sizeof(s->filename));
}
#if 1 //web control led
/* Control led, 0 = OFF, 1 = ON, 2 = Flash */
else if (s->inputbuf[3] == 'L','E','D' && ((s->inputbuf[4] == '0') ||
(s->inputbuf[4] == '1') || (s->inputbuf[4] == '2'))){
Set_LED_mode(s->inputbuf[4]);
s->inputbuf[4]= 0;
//strncpy(s->filename, "/home.html", 10);
strncpy(s->filename, http_webMain_html, sizeof(s->filename));
}
#endif
else {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
strncpy(s->filename, &s->inputbuf[0], sizeof(s->filename));
}
/* httpd_log_file(uip_conn->ripaddr, s->filename);*/
s->state = STATE_OUTPUT;
while(1) {
PSOCK_READTO(&s->sin, ISO_nl);
if(strncmp(s->inputbuf, http_referer, 8) == 0) {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
/* httpd_log(&s->inputbuf[9]);*/
}
}
PSOCK_END(&s->sin);
}(2)LED 设定和控制判断代码如下：
void Set_LED_mode(char lkkcode)
{
//int i;
GPIO_SetMode(P3, BIT6, GPIO_PMD_OUTPUT);
if(lkkcode == ('0')) // LED off
{
P36 = 1;
}else if (lkkcode == '1'){ // LED on
P36 = 0;
}else if(lkkcode == '2') // LED Flash
{
//for(i = 0 ; i< 30 ; ++i)
{
P36 = 0;
Delay(25);
P36 = 1;
Delay(25);
}
}
}最后在网址列输入IP 192.168.XXX.XXX进入 uip web server控制LED，因为uip 有开DHCP 也可设定为固定IP ，看使用者设定输入正确的IP位址
就可以透过web 控制LED,如下可以看到MCU + DM9051相关讯息，最下面可以看到控制LED 选单,
按下on 、off 、Flash后网址后面会分别显示XXX.XXX.XXX.XXX / LED0、1、2让使用者可以知道目前设定
以上完成后就是一个简单webserver 控制LED应用了，最後附上程序:
DM9051 DataSheet
DM9051 SPI 接口以太网模块 + NuTinyM051 + uIP实现web server
希望版上各位大大能够提供一些想法或建议，多多学习，谢谢。
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