0hmX/am3352

scripts/shorten-ddr-address-escapes.ts

/** Compact two-x8 host fix. Reapply after regenerating the ddr_left cache.
 * Validates all saved/fixed copper and tight bounds before changing the cache. */
import {readFileSync,writeFileSync} from 'node:fs'
import {validateDdrProfile} from './validate-ddr-profiles'
const file='src/generated/ddr_left.trace-paths.json',paths=JSON.parse(readFileSync(file,'utf8'))
const path=(ball:string)=>{const p=paths.find((p:any)=>p.connection===`U1.${ball}`);if(!p)throw Error(`Missing ${ball}`);return p}
const wire=(x:number,y:number,layer:string)=>({route_type:'wire',x,y,width:.1016,layer})
const a6=path('D5'),a8=path('D4'),ba0=path('C4')
for(const [p,x,y,layer] of [[a6,-4,4.8,'inner6'],[a8,-4.8,4.8,'inner6'],[ba0,-4.8,5.6,'inner2']] as const){
 const via=p.route[2];if(via.route_type!=='via'||Math.hypot(via.x-x,via.y-y)>1e-7||via.to_layer!==layer)throw Error(`Changed launch at ${p.connection}; re-evaluate geometry`)
}
const endX=a6.route.at(-1).x
if(Math.abs(endX+9.31)>1e-7)throw Error('CPU boundary changed; re-evaluate the corridor')
a6.route=[...a6.route.slice(0,4),wire(-3.6,5.2,'inner6'),wire(-3.6,8.8,'inner6'),wire(-4,9.2,'inner6'),wire(endX,9.2,'inner6')]
// Keep the original via launch; lower only the outer detour and exit.
a8.route=[...a8.route.slice(0,8),wire(-4.4,8.28,'inner6'),wire(-4.4,8.58,'inner6'),wire(-4.8,8.98,'inner6'),wire(endX,8.98,'inner6')]
ba0.route=[...ba0.route.slice(0,6),wire(-5.182,6.5968,'inner2'),wire(-5.3852,6.8,'inner2'),wire(endX,6.8,'inner2')]
const report=validateDdrProfile('ddr_left',paths)
if(!process.argv.includes('--check'))writeFileSync(file,JSON.stringify(paths,null,2)+'\n')
console.log({status:process.argv.includes('--check')?'validated':'saved',allCopperDrc:report.allCopperDrc.valid,ddrDrc:report.ddrCopperDrc.valid,bounds:report.bounds,changedSignals:['DDR_A6','DDR_A8','DDR_BA0']})