static struct gpio_led tl_wr1043nd_leds_gpio[] __initdata = {
{
.name = "tl-wr1043nd:green:wlan",
.gpio = TL_WR1043ND_GPIO_LED_WLAN,
.active_low = 1,
}
};
不清楚 LED 名稱為何要取 tl-wr1043nd:green:wlan 這麼一長串
echo 1 > /sys/class/leds/tl_wr1043nd:green:wlan/brightness熄滅 LED
echo 0 > /sys/class/leds/tl_wr1043nd:green:wlan/brightness應該還有其它用法，待了解。
+---------------+ +--------------------+
| Hybrid |<->|ADC/PWM |
話機-| DC-DC/ringing |<->|PWM/ADC ATmega328P |--UART
| hook detector |-->|PWM |
+---------------+ +--------------------+
ATmega328P 是 AVR 八位元微處理器，也用於 Arduino，可以處理類比訊號，用其 ADC 及 PWM 來轉換類比訊號。作者一系列文章：
+--------+ +--------------------+ +------------+
| |<--|SPI |<-|GPIOs |
話機-| Si3210 | | CPLD | | AR2317 |
| |<->|TDM |->|UART Rx |
+--------+ +--------------------+ | |
| ATmega8L(16B FIFO) |<-|UART Tx |
+--------------------+ +------------+
AR2317 是 Atheros 的無線 MIPS 4KEc SoC，用於 AIR-300 等無線路由器。Si3210 是 FXS 界面晶片，包括 hybrid、DC-DC converter、振鈴、hook 偵測等，語音走 TDM，控制走 SPI。CPLD 主要是要轉換 UART 跟 TDM，但可能是內部 buffer 不夠，所以加 ATmega8L。參考
| Pin | Name | 預設功能 | Bit Bang | |
|---|---|---|---|---|
| CBUS mode | Asynchronous / Synchronous | |||
| 1 | TXD 輸出 | D0 | ||
| 5 | RXD 輸入 | D1 | ||
| 3 | RTS# 輸出 (Arduino Reset) | D2 | ||
| 11 | CTS# 輸入 | D3 | ||
| 2 | DTR# 輸出 (Arduino Reset) | D4 | ||
| 9 | DSR# 輸入 | D5 | ||
| 10 | DCD# 輸入 | D6 | ||
| 6 | RI# 輸入 | D7 | ||
| 23 | CBUS0 | TXLED# 輸出 | 4-bit GPIO | 其中兩個作為 RD# 及 WR# |
| 22 | CBUS1 | RXLED# 輸出 | ||
| 13 | CBUS2 | TXDEN 輸出，RS-485 用。 | ||
| 14 | CBUS3 | PWREN# 輸出，需外加 10kΩ pull high，USB 設定完 low，USB suspend 時 high。 | ||
| 12 | CBUS4 | SLEEP# 輸出，USB suspend 時 low。 | ||
| parameter | address | value | 說明 |
|---|---|---|---|
| High Current I/Os | 0.2 | 0 | |
| 1 | 0x40 | IN endpoint size | |
| Vendor ID | 3~2 | 0403h | FTDI default VID |
| Product ID | 5~4 | 6001h | FTDI default PID |
| Device Type | 7~6 | 0x0600 | 0x0600=FT232R |
| Battery Powered | 8.4 | 0 | |
| Remote Wake Up | 8.5 | 1 | RI# low → wake up USB Host Controller in 20 ms |
| Bus Powered | 8.6 | 1 | |
| Load VCP Driver | 8.7 | 1 | Make the host to load VCP driver。此位置是猜測的。 |
| Max Bus Power Current | 9 | 90mA | 以 2 mA 為單位 |
| IN endpoint is isochronous | 0x0a.0 | 0 | |
| OUT endpoint is isochronous | 0x0a.1 | 0 | |
| Enable suspend I/O power down | 0x0a.2 | 0 | |
| Use serial number string | 0x0a.3 | 0 | |
| Change USB Version | 0x0a.4 | 0 | |
| Invert TXD | 0x0b | 0 | |
| Invert RXD | 0 | ||
| Invert RTS# | 0 | ||
| Invert CTS# | 0 | ||
| Invert DTR# | 0 | ||
| Invert DSR# | 0 | ||
| Invert DCD# | 0 | ||
| Invert RI# | 0 | ||
| USB Version | 0x0d~0x0c | 0x0200 | USB 2.0 Full Speed |
| Manufacturer Offset | 0x0e.6~0 | 0x18 | 指向 10, 0x03, "FTDI" |
| Manufacturer Enabled | 0xe.7 | 1 | |
| Manufacturer Size | 0x0f | 10 | byte 數含結尾 0，因每個字佔 2 bytes，所以需乘二 |
| Product Description Offset | 0x10.6~0 | 0x24 | 指向 32, 0x03, "FT232R USB UART" |
| Product Description Enabled | 0x10.7 | 1 | |
| Product Description Size | 0x11 | 32 | |
| Serial Number Offset | 0x12.6~0 | 0x46 | 指向 18, 0x03, "A6001dHI"，A unique serial number |
| Serial Number Enabled | 0x12.7 | 1 | |
| Serial Number Size | 0x13 | 18 | |
| CBUS0 | 0x14.3~0 | 3 | 0=TXDEN, 1=PWREN#, 2=RXLED#, 3=TXLED#, 4=TXRXLED#, 5=SLEEP#, 6=CLK48, 7=CLK24, 8=CLK12, 9=CLK6, 10=Bitbang IO mode, 11=Bitbang WR#, 12=Bitbang RD# |
| CBUS1 | 0x14.7~4 | 2 | |
| CBUS2 | 0x15.3~0 | 0 | |
| CBUS3 | 0x15.7~4 | 1 | |
| CBUS4 | 0x16.3~0 | 5 | |
| Dynamic Content | 0x18~0x7f | 見說明 | 預設應該是放 Manufacturer, Production Description, 及 Serial 字串。字串含 0，每字佔兩個 byte。格式依序是長度，0x03，字串本身。 10, 0x03, "FTDI" 32, 0x03, "FT232R USB UART" 18, 0x03, "A6001dHI" |
| ChipID | 0x86~0x89 | 見說明 |
