TI中文支持网Hello everyone,
I have a cc1101 question asking for help.
I transmit data using cc1101. when the data rate at 2kbps the transmition is good , but when the speed reaches 250kbps, the packet loss rate increase to 30%.
2kbps and 250kbps send and receive configuration files are as follows.
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// Sync word qualifier mode = 30/32 sync word bits detected// CRC autoflush = false// Channel spacing = 199.951172// Data format = Normal mode// Data rate = 2.39897// RX filter BW = 58.035714// PA ramping = false// Preamble count = 4// Whitening = false// Address config = No address check// Carrier frequency = 433.999969// Device address = 0// TX power = 0// Manchester enable = false// CRC enable = true// Deviation = 5.157471// Packet length mode = Variable packet length mode. Packet length configured by the first byte after sync word// Packet length = 255// Modulation format = GFSK// Base frequency = 433.999969// Modulated = true// Channel number = 0// PA table#define PA_TABLE {0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,} static const registerSetting_t preferredSettings[]={ |
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// Sync word qualifier mode = 30/32 sync word bits detected// CRC autoflush = false// Channel spacing = 199.951172// Data format = Normal mode// Data rate = 249.939// RX filter BW = 541.666667// PA ramping = false// Preamble count = 4// Whitening = false// Address config = No address check// Carrier frequency = 433.999969// Device address = 0// TX power = 0// Manchester enable = false// CRC enable = true// Deviation = 126.953125// Packet length mode = Variable packet length mode. Packet length configured by the first byte after sync word// Packet length = 255// Modulation format = GFSK// Base frequency = 433.999969// Modulated = true// Channel number = 0// PA table#define PA_TABLE {0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,} static const registerSetting_t preferredSettings[]={ |
yuan li：
all the configuration file are exported from smartRf studio.
Loops：
回复 yuan li:
距离近情况下,差距不应该有这么大.
1. 你的板子硬件和天线确定没问题? 是TI的开发板?
2. 你测试时候距离多少?
3. 你晶振精度如何?
Viki Shi：
回复 yuan li:
这个问题在E2E英文版也提问了，已有工程师给出回复： e2e.ti.com/…/666559
