nextpnr/ecp5/docs/primitives.md

# nextpnr-ecp5 Primitive Support List

nextpnr-ecp5 currently supports the following primitives:
 
 - **ALU54B** (limited support, must be manually placed)
 - **CCU2C**
 - **CLKDIVF**
 - **DCUA**
 - **DDRDLLA**
 - **DELAYF**
 - **DELAYG**
 - **DP16KD**
 - **DQSBUFM**
 - **DTR**
 - **ECLKSYNCB**
 - **EHXPLLL**
 - **EXTREFB**
 - **GSR**
 - **IDDR71B**
 - **IDDRX1F**
 - **IDDRX2DQA**
 - **IDDRX2F**
 - **IOLOGIC**
 - **JTAGG** (untested)
 - **L6MUX21**
 - **LUT4**
 - **MULT18X18D** (cascade functionality not supported)
 - **ODDR71B**
 - **ODDRX1F**
 - **ODDRX2DQA**
 - **ODDRX2DQSB**
 - **ODDRX2F**
 - **OSCG**
 - **OSHX2A**
 - **PCSCLKDIV**
 - **PFUMX**
 - **SEDGA** (untested)
 - **SIOLOGIC**
 - **TRELLIS_DPR16X4**
 - **TRELLIS_ECLKBUF**
 - **TRELLIS_FF**
 - **TRELLIS_IO**
 - **TRELLIS_SLICE**
 - **TSHX2DQA**
 - **TSHX2DQSA**
 - **USRMCLK**
ecp5: Add list of supported primitives Signed-off-by: David Shah <davey1576@gmail.com> 2019-02-24 05:06:42 +08:00			`# nextpnr-ecp5 Primitive Support List`

			`nextpnr-ecp5 currently supports the following primitives:`

			`- ALU54B (limited support, must be manually placed)`
			`- CCU2C`
			`- CLKDIVF`
			`- DCUA`
			`- DDRDLLA`
			`- DELAYF`
			`- DELAYG`
			`- DP16KD`
			`- DQSBUFM`
			`- DTR`
			`- ECLKSYNCB`
			`- EHXPLLL`
			`- EXTREFB`
			`- GSR`
			`- IDDR71B`
			`- IDDRX1F`
			`- IDDRX2DQA`
			`- IDDRX2F`
			`- IOLOGIC`
			`- JTAGG (untested)`
			`- L6MUX21`
			`- LUT4`
			`- MULT18X18D (cascade functionality not supported)`
			`- ODDR71B`
			`- ODDRX1F`
			`- ODDRX2DQA`
			`- ODDRX2DQSB`
			`- ODDRX2F`
			`- OSCG`
			`- OSHX2A`
			`- PCSCLKDIV`
			`- PFUMX`
			`- SEDGA (untested)`
			`- SIOLOGIC`
			`- TRELLIS_DPR16X4`
			`- TRELLIS_ECLKBUF`
			`- TRELLIS_FF`
			`- TRELLIS_IO`
			`- TRELLIS_SLICE`
			`- TSHX2DQA`
			`- TSHX2DQSA`
Remove comment about the USRMCLK primitive being untested. Tested and verified working: the trivial configuration: module USRMCLK( USRMCLKI, USRMCLKTS ); input USRMCLKI, USRMCLKTS; endmodule module top( input clk ); reg[ 24:0 ] count = 0; always @( posedge clk ) begin count <= count + 1'b1; end USRMCLK mspi( .USRMCLKI( count[ 20 ] ), .USRMCLKTS( count[ 24 ] ) ); endmodule produces the expected output (toggling at high frequency, toggling tri-state at lower frequency) on an LFE5U-85 when fed with an appropriate clock. See https://bayimg.com/AAnNKAAGO for an example. The top (magenta) trace is the MCLK line. 2020-04-03 11:35:35 +08:00			`- USRMCLK`
ecp5: Add list of supported primitives Signed-off-by: David Shah <davey1576@gmail.com> 2019-02-24 05:06:42 +08:00